115428685820 has 24 divisors (see below), whose sum is σ = 277028846304. Its totient is φ = 39575549376.

The previous prime is 115428685811. The next prime is 115428685843. The reversal of 115428685820 is 28586824511.

It is a congruent number.

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, 412245167 + ... + 412245446.

It is an arithmetic number, because the mean of its divisors is an integer number (11542868596).

Almost surely, 2^115428685820 is an apocalyptic number.

115428685820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115428685820 is an abundant number, since it is smaller than the sum of its proper divisors (161600160484).

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

115428685820 is a wasteful number, since it uses less digits than its factorization.

115428685820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824490629 (or 824490627 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 50.

The spelling of 115428685820 in words is "one hundred fifteen billion, four hundred twenty-eight million, six hundred eighty-five thousand, eight hundred twenty".