396819774 has 36 divisors (see below), whose sum is σ = 931007376. Its totient is φ = 122097456.

The previous prime is 396819767. The next prime is 396819793. The reversal of 396819774 is 477918693.

It is a happy number.

It is a super-2 number, since 2×396819774² = 314931866074822152, 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 396819774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62182 + ... + 68265.

It is an arithmetic number, because the mean of its divisors is an integer number (25861316).

Almost surely, 2^396819774 is an apocalyptic number.

396819774 is an abundant number, since it is smaller than the sum of its proper divisors (534187602).

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

396819774 is a wasteful number, since it uses less digits than its factorization.

396819774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130481 (or 130465 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 396819774 is about 19920.3356899426. The cubic root of 396819774 is about 734.8484263313.

It can be divided in two parts, 39681 and 9774, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 396819774 in words is "three hundred ninety-six million, eight hundred nineteen thousand, seven hundred seventy-four".