1172389140 has 240 divisors, whose sum is σ = 3995671680. Its totient is φ = 286053120.

The previous prime is 1172389117. The next prime is 1172389147. The reversal of 1172389140 is 419832711.

It is a happy number.

It is a super-3 number, since 3×1172389140³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1172389095 and 1172389104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172389147) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3769585 + ... + 3769895.

It is an arithmetic number, because the mean of its divisors is an integer number (16648632).

Almost surely, 2^1172389140 is an apocalyptic number.

1172389140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172389140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997835840).

1172389140 is an abundant number, since it is smaller than the sum of its proper divisors (2823282540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1172389140 is a wasteful number, since it uses less digits than its factorization.

1172389140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1172389140 is about 34240.1685159405. The cubic root of 1172389140 is about 1054.4449930737. Note that the first 3 decimals are identical.

The spelling of 1172389140 in words is "one billion, one hundred seventy-two million, three hundred eighty-nine thousand, one hundred forty".