656090 has 8 divisors (see below), whose sum is σ = 1180980. Its totient is φ = 262432.

The previous prime is 656077. The next prime is 656113. The reversal of 656090 is 90656.

It can be written as a sum of positive squares in 2 ways, for example, as 638401 + 17689 = 799^2 + 133^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 32795 + ... + 32814.

2⁶⁵⁶⁰⁹⁰ is an apocalyptic number.

656090 is a deficient number, since it is larger than the sum of its proper divisors (524890).

656090 is a wasteful number, since it uses less digits than its factorization.

656090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65616.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 656090 is about 809.9938271370. The cubic root of 656090 is about 86.8936031448.

The spelling of 656090 in words is "six hundred fifty-six thousand, ninety".