396889340 has 24 divisors (see below), whose sum is σ = 834760080. Its totient is φ = 158509568.

The previous prime is 396889333. The next prime is 396889369. The reversal of 396889340 is 43988693.

It is a super-2 number, since 2×396889340² = 315042296411271200, which contains 22 as substring.

It is a congruent number.

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, 1877 + ... + 28236.

It is an arithmetic number, because the mean of its divisors is an integer number (34781670).

Almost surely, 2^396889340 is an apocalyptic number.

It is an amenable number.

396889340 is an abundant number, since it is smaller than the sum of its proper divisors (437870740).

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

396889340 is a wasteful number, since it uses less digits than its factorization.

396889340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30781 (or 30779 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 396889340 is about 19922.0817185353. The cubic root of 396889340 is about 734.8913656218.

The spelling of 396889340 in words is "three hundred ninety-six million, eight hundred eighty-nine thousand, three hundred forty".