399134810880 has 864 divisors, whose sum is σ = 1548148492800. Its totient is φ = 94277468160.

The previous prime is 399134810873. The next prime is 399134810891. The reversal of 399134810880 is 88018431993.

399134810880 is a `hidden beast` number, since 39 + 91 + 348 + 108 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 691741152 + ... + 691741728.

Almost surely, 2^399134810880 is an apocalyptic number.

399134810880 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 399134810880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774074246400).

399134810880 is an abundant number, since it is smaller than the sum of its proper divisors (1149013681920).

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

399134810880 is a wasteful number, since it uses less digits than its factorization.

399134810880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 399134810880 in words is "three hundred ninety-nine billion, one hundred thirty-four million, eight hundred ten thousand, eight hundred eighty".