399405062672 has 240 divisors, whose sum is σ = 1069368609600. Its totient is φ = 142337018880.

The previous prime is 399405062629. The next prime is 399405062681. The reversal of 399405062672 is 276260504993.

It is a super-3 number, since 3×399405062672³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4709798 + ... + 4793850.

It is an arithmetic number, because the mean of its divisors is an integer number (4455702540).

Almost surely, 2^399405062672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399405062672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534684304800).

399405062672 is an abundant number, since it is smaller than the sum of its proper divisors (669963546928).

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

399405062672 is a wasteful number, since it uses less digits than its factorization.

399405062672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84134 (or 84121 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 399405062672 in words is "three hundred ninety-nine billion, four hundred five million, sixty-two thousand, six hundred seventy-two".