15231398040 has 48 divisors (see below), whose sum is σ = 49502044800. Its totient is φ = 4061706048.

The previous prime is 15231397991. The next prime is 15231398069. The reversal of 15231398040 is 4089313251.

15231398040 is a `hidden beast` number, since 1 + 523 + 1 + 3 + 98 + 0 + 40 = 666.

15231398040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 15231397986 and 15231398004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21154360 + ... + 21155079.

It is an arithmetic number, because the mean of its divisors is an integer number (1031292600).

Almost surely, 2^15231398040 is an apocalyptic number.

15231398040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15231398040 is an abundant number, since it is smaller than the sum of its proper divisors (34270646760).

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

15231398040 is a wasteful number, since it uses less digits than its factorization.

15231398040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42309456 (or 42309449 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 15231398040 in words is "fifteen billion, two hundred thirty-one million, three hundred ninety-eight thousand, forty".