15378735428 has 24 divisors (see below), whose sum is σ = 31507655424. Its totient is φ = 6430132800.

The previous prime is 15378735419. The next prime is 15378735481. The reversal of 15378735428 is 82453787351.

It is a self number, because there is not a number n which added to its sum of digits gives 15378735428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6696908 + ... + 6699203.

It is an arithmetic number, because the mean of its divisors is an integer number (1312818976).

Almost surely, 2^15378735428 is an apocalyptic number.

It is an amenable number.

15378735428 is an abundant number, since it is smaller than the sum of its proper divisors (16128919996).

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

15378735428 is a wasteful number, since it uses less digits than its factorization.

15378735428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13396163 (or 13396161 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 53.

The spelling of 15378735428 in words is "fifteen billion, three hundred seventy-eight million, seven hundred thirty-five thousand, four hundred twenty-eight".