625690 has 16 divisors (see below), whose sum is σ = 1213128. Its totient is φ = 230976.

The previous prime is 625663. The next prime is 625697. The reversal of 625690 is 96526.

625690 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 4 ways, for example, as 466489 + 159201 = 683^2 + 399^2 .

It is a super-2 number, since 2×625690² = 782975952200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2277 + ... + 2536.

2⁶²⁵⁶⁹⁰ is an apocalyptic number.

625690 is a deficient number, since it is larger than the sum of its proper divisors (587438).

625690 is a wasteful number, since it uses less digits than its factorization.

625690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 625690 is about 791.0056889808. The cubic root of 625690 is about 85.5302493198.

The spelling of 625690 in words is "six hundred twenty-five thousand, six hundred ninety".