399994964 has 12 divisors (see below), whose sum is σ = 702108288. Its totient is φ = 199392600.

The previous prime is 399994951. The next prime is 399994967. The reversal of 399994964 is 469499993.

It is a super-2 number, since 2×399994964² = 319991942450722592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399994897 and 399994906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399994967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149732 + ... + 152379.

It is an arithmetic number, because the mean of its divisors is an integer number (58509024).

Almost surely, 2^399994964 is an apocalyptic number.

It is an amenable number.

399994964 is a deficient number, since it is larger than the sum of its proper divisors (302113324).

399994964 is a wasteful number, since it uses less digits than its factorization.

399994964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302446 (or 302444 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 62.

The square root of 399994964 is about 19999.8740996037. The cubic root of 399994964 is about 736.8032075847.

The spelling of 399994964 in words is "three hundred ninety-nine million, nine hundred ninety-four thousand, nine hundred sixty-four".