78310252 has 6 divisors (see below), whose sum is σ = 137042948. Its totient is φ = 39155124.

The previous prime is 78310223. The next prime is 78310277. The reversal of 78310252 is 25201387.

It is a super-2 number, since 2×78310252² = 12264991136607008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78310252.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9788778 + ... + 9788785.

Almost surely, 2^78310252 is an apocalyptic number.

It is an amenable number.

78310252 is a deficient number, since it is larger than the sum of its proper divisors (58732696).

78310252 is a wasteful number, since it uses less digits than its factorization.

78310252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19577567 (or 19577565 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 78310252 is about 8849.3079955441. The cubic root of 78310252 is about 427.8316148405.

The spelling of 78310252 in words is "seventy-eight million, three hundred ten thousand, two hundred fifty-two".