399163212 has 54 divisors (see below), whose sum is σ = 1173735108. Its totient is φ = 114046128.

The previous prime is 399163201. The next prime is 399163231. The reversal of 399163212 is 212361993.

It is a happy number.

399163212 is a `hidden beast` number, since 3 + 9 + 9 + 1 + 632 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111378 + ... + 114905.

Almost surely, 2^399163212 is an apocalyptic number.

It is an amenable number.

399163212 is an abundant number, since it is smaller than the sum of its proper divisors (774571896).

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

399163212 is a wasteful number, since it uses less digits than its factorization.

399163212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226307 (or 226295 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 399163212 is about 19979.0693476949. The cubic root of 399163212 is about 736.2921488068.

The spelling of 399163212 in words is "three hundred ninety-nine million, one hundred sixty-three thousand, two hundred twelve".