78257296 has 20 divisors (see below), whose sum is σ = 163287292. Its totient is φ = 36118656.

The previous prime is 78257287. The next prime is 78257323. The reversal of 78257296 is 69275287.

It can be written as a sum of positive squares in 2 ways, for example, as 47610000 + 30647296 = 6900^2 + 5536^2 .

It is a super-2 number, since 2×78257296² = 12248408754463232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187911 + ... + 188326.

Almost surely, 2^78257296 is an apocalyptic number.

It is an amenable number.

78257296 is an abundant number, since it is smaller than the sum of its proper divisors (85029996).

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

78257296 is a wasteful number, since it uses less digits than its factorization.

78257296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376258 (or 376252 counting only the distinct ones).

The product of its digits is 423360, while the sum is 46.

The square root of 78257296 is about 8846.3153911671. The cubic root of 78257296 is about 427.7351550994.

Subtracting from 78257296 its reverse (69275287), we obtain a square (8982009 = 2997²).

The spelling of 78257296 in words is "seventy-eight million, two hundred fifty-seven thousand, two hundred ninety-six".