2656290 has 96 divisors (see below), whose sum is σ = 8043840. Its totient is φ = 556416.

The previous prime is 2656289. The next prime is 2656309. The reversal of 2656290 is 926562.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19041 + ... + 19179.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^2656290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2656290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4021920).

2656290 is an abundant number, since it is smaller than the sum of its proper divisors (5387550).

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

2656290 is a wasteful number, since it uses less digits than its factorization.

2656290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 2656290 is about 1629.8128726943. The cubic root of 2656290 is about 138.4921515882.

It can be divided in two parts, 265 and 6290, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 2656290 in words is "two million, six hundred fifty-six thousand, two hundred ninety".