399792887 has 8 divisors (see below), whose sum is σ = 440559504. Its totient is φ = 360456768.

The previous prime is 399792863. The next prime is 399792901. The reversal of 399792887 is 788297993.

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

It is a cyclic number.

It is not a de Polignac number, because 399792887 - 2¹² = 399788791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399792787) 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, 357038 + ... + 358155.

It is an arithmetic number, because the mean of its divisors is an integer number (55069938).

Almost surely, 2^399792887 is an apocalyptic number.

399792887 is a deficient number, since it is larger than the sum of its proper divisors (40766617).

399792887 is a wasteful number, since it uses less digits than its factorization.

399792887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715249.

The product of its digits is 13716864, while the sum is 62.

The square root of 399792887 is about 19994.8215045796. The cubic root of 399792887 is about 736.6791093039.

The spelling of 399792887 in words is "three hundred ninety-nine million, seven hundred ninety-two thousand, eight hundred eighty-seven".