78990250 has 16 divisors (see below), whose sum is σ = 147870216. Its totient is φ = 31596000.

The previous prime is 78990199. The next prime is 78990271. The reversal of 78990250 is 5209987.

It can be written as a sum of positive squares in 4 ways, for example, as 6007401 + 72982849 = 2451^2 + 8543^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157731 + ... + 158230.

Almost surely, 2^78990250 is an apocalyptic number.

78990250 is a deficient number, since it is larger than the sum of its proper divisors (68879966).

78990250 is a wasteful number, since it uses less digits than its factorization.

78990250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315978 (or 315968 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 78990250 is about 8887.6459200398. The cubic root of 78990250 is about 429.0663897847.

The spelling of 78990250 in words is "seventy-eight million, nine hundred ninety thousand, two hundred fifty".