399513822 has 8 divisors (see below), whose sum is σ = 799027656. Its totient is φ = 133171272.

The previous prime is 399513797. The next prime is 399513853. The reversal of 399513822 is 228315993.

It is a sphenic number, since it is the product of 3 distinct primes.

399513822 is an admirable number.

It is a super-2 number, since 2×399513822² = 319222587938095368, 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 3 ways as a sum of consecutive naturals, for example, 33292813 + ... + 33292824.

It is an arithmetic number, because the mean of its divisors is an integer number (99878457).

Almost surely, 2^399513822 is an apocalyptic number.

399513822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

399513822 is a wasteful number, since it uses less digits than its factorization.

399513822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66585642.

The product of its digits is 116640, while the sum is 42.

The square root of 399513822 is about 19987.8418544874. The cubic root of 399513822 is about 736.5076628588.

The spelling of 399513822 in words is "three hundred ninety-nine million, five hundred thirteen thousand, eight hundred twenty-two".