656080 has 40 divisors (see below), whose sum is σ = 1562400. Its totient is φ = 256128.

The previous prime is 656077. The next prime is 656113. The reversal of 656080 is 80656.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

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, 4651 + ... + 4789.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2⁶⁵⁶⁰⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781200).

656080 is an abundant number, since it is smaller than the sum of its proper divisors (906320).

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

656080 is a wasteful number, since it uses less digits than its factorization.

656080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 656080 is about 809.9876542269. The cubic root of 656080 is about 86.8931616706.

It can be divided in two parts, 6560 and 80, that multiplied together give a triangular number (524800 = T₁₀₂₄).

The spelling of 656080 in words is "six hundred fifty-six thousand, eighty".