399031248 has 160 divisors (see below), whose sum is σ = 1298488320. Its totient is φ = 102574080.

The previous prime is 399031201. The next prime is 399031249. The reversal of 399031248 is 842130993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399031249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394968 + ... + 395976.

It is an arithmetic number, because the mean of its divisors is an integer number (8115552).

Almost surely, 2^399031248 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 399031248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649244160).

399031248 is an abundant number, since it is smaller than the sum of its proper divisors (899457072).

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

399031248 is a wasteful number, since it uses less digits than its factorization.

399031248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 399031248 is about 19975.7665184593. The cubic root of 399031248 is about 736.2110000739.

The spelling of 399031248 in words is "three hundred ninety-nine million, thirty-one thousand, two hundred forty-eight".