686233999400 has 48 divisors (see below), whose sum is σ = 1597437785340. Its totient is φ = 274159193600.

The previous prime is 686233999337. The next prime is 686233999427. The reversal of 686233999400 is 4999332686.

It can be written as a sum of positive squares in 6 ways, for example, as 202088009764 + 484145989636 = 449542^2 + 695806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 686233999400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1925429 + ... + 2253828.

Almost surely, 2^686233999400 is an apocalyptic number.

It is an amenable number.

686233999400 is an abundant number, since it is smaller than the sum of its proper divisors (911203785940).

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

686233999400 is a wasteful number, since it uses less digits than its factorization.

686233999400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180094 (or 4180085 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 59.

The spelling of 686233999400 in words is "six hundred eighty-six billion, two hundred thirty-three million, nine hundred ninety-nine thousand, four hundred".