399095658 has 48 divisors (see below), whose sum is σ = 934369800. Its totient is φ = 122383872.

The previous prime is 399095639. The next prime is 399095677. The reversal of 399095658 is 856590993.

It is an interprime number because it is at equal distance from previous prime (399095639) and next prime (399095677).

It can be written as a sum of positive squares in 4 ways, for example, as 60793209 + 338302449 = 7797^2 + 18393^2 .

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, 70518 + ... + 75966.

Almost surely, 2^399095658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399095658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (467184900).

399095658 is an abundant number, since it is smaller than the sum of its proper divisors (535274142).

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

399095658 is a wasteful number, since it uses less digits than its factorization.

399095658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783 (or 5780 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The square root of 399095658 is about 19977.3786568709. The cubic root of 399095658 is about 736.2506100039.

The spelling of 399095658 in words is "three hundred ninety-nine million, ninety-five thousand, six hundred fifty-eight".