396285931 has 4 divisors (see below), whose sum is σ = 398031912. Its totient is φ = 394539952.

The previous prime is 396285917. The next prime is 396285961. The reversal of 396285931 is 139582693.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 396285931 - 2²¹ = 394188779 is a prime.

It is a super-2 number, since 2×396285931² = 314085078217073522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396285961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872650 + ... + 873103.

It is an arithmetic number, because the mean of its divisors is an integer number (99507978).

Almost surely, 2^396285931 is an apocalyptic number.

396285931 is a deficient number, since it is larger than the sum of its proper divisors (1745981).

396285931 is a wasteful number, since it uses less digits than its factorization.

396285931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745980.

The product of its digits is 349920, while the sum is 46.

The square root of 396285931 is about 19906.9317324393. The cubic root of 396285931 is about 734.5187470800.

It can be divided in two parts, 396 and 285931, that multiplied together give a triangular number (113228676 = T₁₅₀₄₈).

The spelling of 396285931 in words is "three hundred ninety-six million, two hundred eighty-five thousand, nine hundred thirty-one".