399245706140 has 24 divisors (see below), whose sum is σ = 838433024352. Its totient is φ = 159695036480.

The previous prime is 399245706059. The next prime is 399245706169. The reversal of 399245706140 is 41607542993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971510 + ... + 1319970.

It is an arithmetic number, because the mean of its divisors is an integer number (34934709348).

Almost surely, 2^399245706140 is an apocalyptic number.

It is an amenable number.

399245706140 is an abundant number, since it is smaller than the sum of its proper divisors (439187318212).

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

399245706140 is a wasteful number, since it uses less digits than its factorization.

399245706140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405757 (or 405755 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 399245706140 in words is "three hundred ninety-nine billion, two hundred forty-five million, seven hundred six thousand, one hundred forty".