396307278 has 48 divisors (see below), whose sum is σ = 874809936. Its totient is φ = 129634560.

The previous prime is 396307231. The next prime is 396307313. The reversal of 396307278 is 872703693.

It is a happy number.

396307278 is a `hidden beast` number, since 3 + 9 + 630 + 7 + 2 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449398 + ... + 450278.

It is an arithmetic number, because the mean of its divisors is an integer number (18225207).

Almost surely, 2^396307278 is an apocalyptic number.

396307278 is an abundant number, since it is smaller than the sum of its proper divisors (478502658).

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

396307278 is a wasteful number, since it uses less digits than its factorization.

396307278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 396307278 is about 19907.4678952397. The cubic root of 396307278 is about 734.5319357811.

The spelling of 396307278 in words is "three hundred ninety-six million, three hundred seven thousand, two hundred seventy-eight".