399924801 has 12 divisors (see below), whose sum is σ = 577868928. Its totient is φ = 266524344.

The previous prime is 399924731. The next prime is 399924817. The reversal of 399924801 is 108429993.

It is not a de Polignac number, because 399924801 - 2¹⁷ = 399793729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399924841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29016 + ... + 40518.

It is an arithmetic number, because the mean of its divisors is an integer number (48155744).

Almost surely, 2^399924801 is an apocalyptic number.

It is an amenable number.

399924801 is a deficient number, since it is larger than the sum of its proper divisors (177944127).

399924801 is a wasteful number, since it uses less digits than its factorization.

399924801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15372 (or 15369 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 399924801 is about 19998.1199366340. The cubic root of 399924801 is about 736.7601242536.

The spelling of 399924801 in words is "three hundred ninety-nine million, nine hundred twenty-four thousand, eight hundred one".