399994772572 has 48 divisors (see below), whose sum is σ = 719615232000. Its totient is φ = 194449017024.

The previous prime is 399994772563. The next prime is 399994772581. The reversal of 399994772572 is 275277499993.

It is an interprime number because it is at equal distance from previous prime (399994772563) and next prime (399994772581).

It is a junction number, because it is equal to n+sod(n) for n = 399994772495 and 399994772504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35968429 + ... + 35979547.

It is an arithmetic number, because the mean of its divisors is an integer number (14991984000).

Almost surely, 2^399994772572 is an apocalyptic number.

It is an amenable number.

399994772572 is a deficient number, since it is larger than the sum of its proper divisors (319620459428).

399994772572 is a wasteful number, since it uses less digits than its factorization.

399994772572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12418 (or 12416 counting only the distinct ones).

The product of its digits is 540101520, while the sum is 73.

The spelling of 399994772572 in words is "three hundred ninety-nine billion, nine hundred ninety-four million, seven hundred seventy-two thousand, five hundred seventy-two".