399417372 has 48 divisors (see below), whose sum is σ = 1036953120. Its totient is φ = 132955776.

The previous prime is 399417353. The next prime is 399417391. The reversal of 399417372 is 273714993.

It is an interprime number because it is at equal distance from previous prime (399417353) and next prime (399417391).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92608 + ... + 96824.

It is an arithmetic number, because the mean of its divisors is an integer number (21603190).

Almost surely, 2^399417372 is an apocalyptic number.

It is an amenable number.

399417372 is an abundant number, since it is smaller than the sum of its proper divisors (637535748).

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

399417372 is a wasteful number, since it uses less digits than its factorization.

399417372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107 (or 5099 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 399417372 is about 19985.4289921433. The cubic root of 399417372 is about 736.4483892472.

The spelling of 399417372 in words is "three hundred ninety-nine million, four hundred seventeen thousand, three hundred seventy-two".