78634752 has 72 divisors (see below), whose sum is σ = 239197056. Its totient is φ = 22465536.

The previous prime is 78634739. The next prime is 78634753. The reversal of 78634752 is 25743687.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78634753) 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, 1938 + ... + 12689.

Almost surely, 2^78634752 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 78634752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119598528).

78634752 is an abundant number, since it is smaller than the sum of its proper divisors (160562304).

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

78634752 is a wasteful number, since it uses less digits than its factorization.

78634752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14653 (or 14639 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 78634752 is about 8867.6238079882. The cubic root of 78634752 is about 428.4217463315.

The spelling of 78634752 in words is "seventy-eight million, six hundred thirty-four thousand, seven hundred fifty-two".