399167964 has 144 divisors (see below), whose sum is σ = 1132657344. Its totient is φ = 117734400.

The previous prime is 399167959. The next prime is 399167969. The reversal of 399167964 is 469761993.

399167964 is a `hidden beast` number, since 399 + 167 + 96 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (399167959) and next prime (399167969).

It is a self number, because there is not a number n which added to its sum of digits gives 399167964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399167969) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1362202 + ... + 1362494.

It is an arithmetic number, because the mean of its divisors is an integer number (7865676).

Almost surely, 2^399167964 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 399167964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566328672).

399167964 is an abundant number, since it is smaller than the sum of its proper divisors (733489380).

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

399167964 is a wasteful number, since it uses less digits than its factorization.

399167964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 423 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 399167964 is about 19979.1882717992. The cubic root of 399167964 is about 736.2950706245.

The spelling of 399167964 in words is "three hundred ninety-nine million, one hundred sixty-seven thousand, nine hundred sixty-four".