686424490 has 32 divisors (see below), whose sum is σ = 1282210560. Its totient is φ = 264264000.

The previous prime is 686424469. The next prime is 686424539. The reversal of 686424490 is 94424686.

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, 92415 + ... + 99565.

It is an arithmetic number, because the mean of its divisors is an integer number (40069080).

Almost surely, 2^686424490 is an apocalyptic number.

686424490 is a deficient number, since it is larger than the sum of its proper divisors (595786070).

686424490 is a wasteful number, since it uses less digits than its factorization.

686424490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7518.

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 686424490 is about 26199.7040059616. The cubic root of 686424490 is about 882.1266103039.

The spelling of 686424490 in words is "six hundred eighty-six million, four hundred twenty-four thousand, four hundred ninety".