1389911040 has 528 divisors, whose sum is σ = 5722429440. Its totient is φ = 305233920.

The previous prime is 1389911027. The next prime is 1389911051. The reversal of 1389911040 is 401199831.

It is a super-2 number, since 2×1389911040² = 3863705398227763200, which contains 22 as substring.

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 = 1389910986 and 1389911004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9999291 + ... + 9999429.

Almost surely, 2^1389911040 is an apocalyptic number.

1389911040 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 1389911040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2861214720).

1389911040 is an abundant number, since it is smaller than the sum of its proper divisors (4332518400).

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

1389911040 is a wasteful number, since it uses less digits than its factorization.

1389911040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1389911040 is about 37281.5106990047. The cubic root of 1389911040 is about 1115.9952210070.

The spelling of 1389911040 in words is "one billion, three hundred eighty-nine million, nine hundred eleven thousand, forty".