685078276 has 27 divisors (see below), whose sum is σ = 1255485301. Its totient is φ = 327070304.

The previous prime is 685078181. The next prime is 685078321. The reversal of 685078276 is 672870586.

The square root of 685078276 is 26174.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 112911876 + 572166400 = 10626^2 + 23920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1203720 + ... + 1204288.

Almost surely, 2^685078276 is an apocalyptic number.

685078276 is the 26174-th square number.

It is an amenable number.

685078276 is a deficient number, since it is larger than the sum of its proper divisors (570407025).

685078276 is an equidigital number, since it uses as much as digits as its factorization.

685078276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The cubic root of 685078276 is about 881.5495580646.

Multiplying 685078276 by its sum of digits (49), we get a square (33568835524 = 183218²).

The spelling of 685078276 in words is "six hundred eighty-five million, seventy-eight thousand, two hundred seventy-six".