399274433910 has 288 divisors, whose sum is σ = 1211823456480. Its totient is φ = 90882570240.

The previous prime is 399274433837. The next prime is 399274433951. The reversal of 399274433910 is 19334472993.

It is a happy number.

399274433910 is a `hidden beast` number, since 3 + 99 + 27 + 443 + 3 + 91 + 0 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23372292 + ... + 23389368.

It is an arithmetic number, because the mean of its divisors is an integer number (4207720335).

Almost surely, 2^399274433910 is an apocalyptic number.

399274433910 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 399274433910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605911728240).

399274433910 is an abundant number, since it is smaller than the sum of its proper divisors (812549022570).

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

399274433910 is a wasteful number, since it uses less digits than its factorization.

399274433910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17244 (or 17230 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 399274433910 in words is "three hundred ninety-nine billion, two hundred seventy-four million, four hundred thirty-three thousand, nine hundred ten".