399963974 has 8 divisors (see below), whose sum is σ = 626030640. Its totient is φ = 191287096.

The previous prime is 399963973. The next prime is 399963983. The reversal of 399963974 is 479369993.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399963973) 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 3 ways as a sum of consecutive naturals, for example, 4347389 + ... + 4347480.

It is an arithmetic number, because the mean of its divisors is an integer number (78253830).

Almost surely, 2^399963974 is an apocalyptic number.

399963974 is a deficient number, since it is larger than the sum of its proper divisors (226066666).

399963974 is a wasteful number, since it uses less digits than its factorization.

399963974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694894.

The product of its digits is 9920232, while the sum is 59.

The square root of 399963974 is about 19999.0993297198. The cubic root of 399963974 is about 736.7841789108.

The spelling of 399963974 in words is "three hundred ninety-nine million, nine hundred sixty-three thousand, nine hundred seventy-four".