78047512 has 32 divisors (see below), whose sum is σ = 149850000. Its totient is φ = 38098944.

The previous prime is 78047509. The next prime is 78047513. The reversal of 78047512 is 21574087.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78047513) 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, 61864 + ... + 63112.

Almost surely, 2^78047512 is an apocalyptic number.

It is an amenable number.

78047512 is a deficient number, since it is larger than the sum of its proper divisors (71802488).

78047512 is a wasteful number, since it uses less digits than its factorization.

78047512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 78047512 is about 8834.4502941609. The cubic root of 78047512 is about 427.3526037916.

The spelling of 78047512 in words is "seventy-eight million, forty-seven thousand, five hundred twelve".