1172873520 has 840 divisors, whose sum is σ = 5357308896. Its totient is φ = 232906752.

The previous prime is 1172873497. The next prime is 1172873573. The reversal of 1172873520 is 253782711.

It is a tau number, because it is divible by the number of its divisors (840).

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

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 68992552 + ... + 68992568.

Almost surely, 2^1172873520 is an apocalyptic number.

1172873520 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 1172873520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678654448).

1172873520 is an abundant number, since it is smaller than the sum of its proper divisors (4184435376).

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

1172873520 is a wasteful number, since it uses less digits than its factorization.

1172873520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1172873520 is about 34247.2410567625. The cubic root of 1172873520 is about 1054.5901899554.

The spelling of 1172873520 in words is "one billion, one hundred seventy-two million, eight hundred seventy-three thousand, five hundred twenty".