399703631946 has 32 divisors (see below), whose sum is σ = 802183340160. Its totient is φ = 132772132416.

The previous prime is 399703631941. The next prime is 399703632023. The reversal of 399703631946 is 649136307993.

It is a self number, because there is not a number n which added to its sum of digits gives 399703631946.

It is not an unprimeable number, because it can be changed into a prime (399703631941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6281080 + ... + 6344396.

It is an arithmetic number, because the mean of its divisors is an integer number (25068229380).

Almost surely, 2^399703631946 is an apocalyptic number.

399703631946 is an abundant number, since it is smaller than the sum of its proper divisors (402479708214).

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

399703631946 is a wasteful number, since it uses less digits than its factorization.

399703631946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66958.

The product of its (nonzero) digits is 19840464, while the sum is 60.

The spelling of 399703631946 in words is "three hundred ninety-nine billion, seven hundred three million, six hundred thirty-one thousand, nine hundred forty-six".