2656830 has 64 divisors (see below), whose sum is σ = 7112448. Its totient is φ = 629760.

The previous prime is 2656813. The next prime is 2656831. The reversal of 2656830 is 386562.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27342 + ... + 27438.

It is an arithmetic number, because the mean of its divisors is an integer number (111132).

2^2656830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2656830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3556224).

2656830 is an abundant number, since it is smaller than the sum of its proper divisors (4455618).

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

2656830 is a wasteful number, since it uses less digits than its factorization.

2656830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2656830 is about 1629.9785274659. The cubic root of 2656830 is about 138.5015356909.

It can be divided in two parts, 2656 and 830, that added together give a triangular number (3486 = T₈₃).

The spelling of 2656830 in words is "two million, six hundred fifty-six thousand, eight hundred thirty".