78529536 has 66 divisors (see below), whose sum is σ = 226778942. Its totient is φ = 26173440.

The previous prime is 78529523. The next prime is 78529543. The reversal of 78529536 is 63592587.

It is a happy number.

78529536 is a `hidden beast` number, since 78 + 529 + 53 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 66585600 + 11943936 = 8160^2 + 3456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78529491 and 78529500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4956 + ... + 13476.

Almost surely, 2^78529536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78529536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113389471).

78529536 is an abundant number, since it is smaller than the sum of its proper divisors (148249406).

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

78529536 is a wasteful number, since it uses less digits than its factorization.

78529536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547 (or 8526 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 78529536 is about 8861.6892294867. The cubic root of 78529536 is about 428.2305800381.

The spelling of 78529536 in words is "seventy-eight million, five hundred twenty-nine thousand, five hundred thirty-six".