399008897865 has 24 divisors (see below), whose sum is σ = 691652602368. Its totient is φ = 212793305760.

The previous prime is 399008897851. The next prime is 399008897891. The reversal of 399008897865 is 568798800993.

It is not a de Polignac number, because 399008897865 - 2¹² = 399008893769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399008897793 and 399008897802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 643962 + ... + 1101228.

It is an arithmetic number, because the mean of its divisors is an integer number (28818858432).

Almost surely, 2^399008897865 is an apocalyptic number.

It is an amenable number.

399008897865 is a deficient number, since it is larger than the sum of its proper divisors (292643704503).

399008897865 is a wasteful number, since it uses less digits than its factorization.

399008897865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476669 (or 476666 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 72.

The spelling of 399008897865 in words is "three hundred ninety-nine billion, eight million, eight hundred ninety-seven thousand, eight hundred sixty-five".