78531052 has 6 divisors (see below), whose sum is σ = 137429348. Its totient is φ = 39265524.

The previous prime is 78530999. The next prime is 78531067. The reversal of 78531052 is 25013587.

It is a super-2 number, since 2×78531052² = 12334252256453408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9816378 + ... + 9816385.

Almost surely, 2^78531052 is an apocalyptic number.

It is an amenable number.

78531052 is a deficient number, since it is larger than the sum of its proper divisors (58898296).

78531052 is a wasteful number, since it uses less digits than its factorization.

78531052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19632767 (or 19632765 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 78531052 is about 8861.7747658130. The cubic root of 78531052 is about 428.2333356611.

The spelling of 78531052 in words is "seventy-eight million, five hundred thirty-one thousand, fifty-two".