695578640 has 20 divisors (see below), whose sum is σ = 1617220524. Its totient is φ = 278231424.

The previous prime is 695578633. The next prime is 695578679. The reversal of 695578640 is 46875596.

It can be written as a sum of positive squares in 2 ways, for example, as 215267584 + 480311056 = 14672^2 + 21916^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 4347287 + ... + 4347446.

Almost surely, 2^695578640 is an apocalyptic number.

It is an amenable number.

695578640 is an abundant number, since it is smaller than the sum of its proper divisors (921641884).

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

695578640 is a wasteful number, since it uses less digits than its factorization.

695578640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8694746 (or 8694740 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The square root of 695578640 is about 26373.8249027326. The cubic root of 695578640 is about 886.0306504759.

The spelling of 695578640 in words is "six hundred ninety-five million, five hundred seventy-eight thousand, six hundred forty".