78616452 has 48 divisors (see below), whose sum is σ = 193760000. Its totient is φ = 24740640.

The previous prime is 78616399. The next prime is 78616457. The reversal of 78616452 is 25461687.

It is a self number, because there is not a number n which added to its sum of digits gives 78616452.

It is not an unprimeable number, because it can be changed into a prime (78616457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113427 + ... + 114117.

Almost surely, 2^78616452 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 78616452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96880000).

78616452 is an abundant number, since it is smaller than the sum of its proper divisors (115143548).

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

78616452 is a wasteful number, since it uses less digits than its factorization.

78616452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1214 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 78616452 is about 8866.5919044467. The cubic root of 78616452 is about 428.3885094312.

The spelling of 78616452 in words is "seventy-eight million, six hundred sixteen thousand, four hundred fifty-two".