399701036 has 72 divisors (see below), whose sum is σ = 837727632. Its totient is φ = 166320000.

The previous prime is 399700979. The next prime is 399701069. The reversal of 399701036 is 630107993.

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, 1207391 + ... + 1207721.

It is an arithmetic number, because the mean of its divisors is an integer number (11635106).

Almost surely, 2^399701036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399701036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418863816).

399701036 is an abundant number, since it is smaller than the sum of its proper divisors (438026596).

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

399701036 is a wasteful number, since it uses less digits than its factorization.

399701036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 399701036 is about 19992.5245029236. The cubic root of 399701036 is about 736.6226885107.

The spelling of 399701036 in words is "three hundred ninety-nine million, seven hundred one thousand, thirty-six".