685428524 has 12 divisors (see below), whose sum is σ = 1308545448. Its totient is φ = 311558400.

The previous prime is 685428517. The next prime is 685428539. The reversal of 685428524 is 425824586.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 15577921 = 685428524 / (6 + 8 + 5 + 4 + 2 + 8 + 5 + 2 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7788917 + ... + 7789004.

It is an arithmetic number, because the mean of its divisors is an integer number (109045454).

Almost surely, 2^685428524 is an apocalyptic number.

It is an amenable number.

685428524 is a deficient number, since it is larger than the sum of its proper divisors (623116924).

685428524 is a wasteful number, since it uses less digits than its factorization.

685428524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15577936 (or 15577934 counting only the distinct ones).

The product of its digits is 614400, while the sum is 44.

The square root of 685428524 is about 26180.6899068760. The cubic root of 685428524 is about 881.6997639496.

The spelling of 685428524 in words is "six hundred eighty-five million, four hundred twenty-eight thousand, five hundred twenty-four".