399131214 has 32 divisors (see below), whose sum is σ = 841176960. Its totient is φ = 125906400.

The previous prime is 399131197. The next prime is 399131221. The reversal of 399131214 is 412131993.

It is a happy number.

It is a super-2 number, since 2×399131214² = 318611451978227592, which contains 22 as substring.

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, 197469 + ... + 199479.

It is an arithmetic number, because the mean of its divisors is an integer number (26286780).

Almost surely, 2^399131214 is an apocalyptic number.

399131214 is an abundant number, since it is smaller than the sum of its proper divisors (442045746).

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

399131214 is a wasteful number, since it uses less digits than its factorization.

399131214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776.

The product of its digits is 5832, while the sum is 33.

The square root of 399131214 is about 19978.2685435951. The cubic root of 399131214 is about 736.2724738927.

The spelling of 399131214 in words is "three hundred ninety-nine million, one hundred thirty-one thousand, two hundred fourteen".