685258428 has 24 divisors (see below), whose sum is σ = 1601488000. Its totient is φ = 228054960.

The previous prime is 685258411. The next prime is 685258447. The reversal of 685258428 is 824852586.

It is a happy number.

685258428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×685258428² = 939158226290062368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37678 + ... + 52821.

Almost surely, 2^685258428 is an apocalyptic number.

It is an amenable number.

685258428 is an abundant number, since it is smaller than the sum of its proper divisors (916229572).

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

685258428 is a wasteful number, since it uses less digits than its factorization.

685258428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91137 (or 91135 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The square root of 685258428 is about 26177.4412042125. The cubic root of 685258428 is about 881.6268236865.

The spelling of 685258428 in words is "six hundred eighty-five million, two hundred fifty-eight thousand, four hundred twenty-eight".