78728524 has 24 divisors (see below), whose sum is σ = 158070528. Its totient is φ = 33609360.

The previous prime is 78728519. The next prime is 78728527. The reversal of 78728524 is 42582787.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (78728527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019 + ... + 12709.

It is an arithmetic number, because the mean of its divisors is an integer number (6586272).

Almost surely, 2^78728524 is an apocalyptic number.

It is an amenable number.

78728524 is an abundant number, since it is smaller than the sum of its proper divisors (79342004).

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

78728524 is a wasteful number, since it uses less digits than its factorization.

78728524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10965 (or 10963 counting only the distinct ones).

The product of its digits is 250880, while the sum is 43.

The square root of 78728524 is about 8872.9095566223. The cubic root of 78728524 is about 428.5919764328.

The spelling of 78728524 in words is "seventy-eight million, seven hundred twenty-eight thousand, five hundred twenty-four".