399898812 has 24 divisors (see below), whose sum is σ = 958317136. Its totient is φ = 129696768.

The previous prime is 399898799. The next prime is 399898817. The reversal of 399898812 is 218898993.

It is a super-2 number, since 2×399898812² = 319838119678022688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399898817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449893 + ... + 450780.

Almost surely, 2^399898812 is an apocalyptic number.

It is an amenable number.

399898812 is an abundant number, since it is smaller than the sum of its proper divisors (558418324).

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

399898812 is a wasteful number, since it uses less digits than its factorization.

399898812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900717 (or 900715 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 57.

The square root of 399898812 is about 19997.4701399952. The cubic root of 399898812 is about 736.7441645251.

The spelling of 399898812 in words is "three hundred ninety-nine million, eight hundred ninety-eight thousand, eight hundred twelve".