399425356800 has 396 divisors, whose sum is σ = 1505418332080. Its totient is φ = 100906352640.

The previous prime is 399425356783. The next prime is 399425356807. The reversal of 399425356800 is 8653524993.

399425356800 is a `hidden beast` number, since 3 + 9 + 9 + 42 + 535 + 68 + 0 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (399425356807) 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 35 ways as a sum of consecutive naturals, for example, 4331979 + ... + 4423221.

Almost surely, 2^399425356800 is an apocalyptic number.

399425356800 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399425356800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752709166040).

399425356800 is an abundant number, since it is smaller than the sum of its proper divisors (1105992975280).

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

399425356800 is a wasteful number, since it uses less digits than its factorization.

399425356800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91298 (or 91272 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 399425356800 in words is "three hundred ninety-nine billion, four hundred twenty-five million, three hundred fifty-six thousand, eight hundred".