399471036840 has 96 divisors (see below), whose sum is σ = 1300883220000. Its totient is φ = 106312083840.

The previous prime is 399471036821. The next prime is 399471036841. The reversal of 399471036840 is 48630174993.

It is a happy number.

399471036840 is a `hidden beast` number, since 3 + 99 + 471 + 0 + 3 + 6 + 84 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (399471036841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 932226 + ... + 1291505.

It is an arithmetic number, because the mean of its divisors is an integer number (13550866875).

Almost surely, 2^399471036840 is an apocalyptic number.

399471036840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399471036840 is an abundant number, since it is smaller than the sum of its proper divisors (901412183160).

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

399471036840 is a wasteful number, since it uses less digits than its factorization.

399471036840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224247 (or 2224240 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 399471036840 in words is "three hundred ninety-nine billion, four hundred seventy-one million, thirty-six thousand, eight hundred forty".