399440196 has 27 divisors (see below), whose sum is σ = 1009999263. Its totient is φ = 133106760.

The previous prime is 399440189. The next prime is 399440203. The reversal of 399440196 is 691044993.

The square root of 399440196 is 19986.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (399440189) and next prime (399440203).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 118251 + ... + 121581.

Almost surely, 2^399440196 is an apocalyptic number.

399440196 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

399440196 is the 19986-th square number.

It is an amenable number.

399440196 is an abundant number, since it is smaller than the sum of its proper divisors (610559067).

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

399440196 is an equidigital number, since it uses as much as digits as its factorization.

399440196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The cubic root of 399440196 is about 736.4624166607.

The spelling of 399440196 in words is "three hundred ninety-nine million, four hundred forty thousand, one hundred ninety-six".