2620904 has 64 divisors (see below), whose sum is σ = 6048000. Its totient is φ = 1048320.

The previous prime is 2620901. The next prime is 2620909. The reversal of 2620904 is 4090262.

It is a self number, because there is not a number n which added to its sum of digits gives 2620904.

It is not an unprimeable number, because it can be changed into a prime (2620901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33137 + ... + 33215.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2^2620904 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 2620904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3024000).

2620904 is an abundant number, since it is smaller than the sum of its proper divisors (3427096).

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

2620904 is a wasteful number, since it uses less digits than its factorization.

2620904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2620904 is about 1618.9206280729. The cubic root of 2620904 is about 137.8744219222.

The spelling of 2620904 in words is "two million, six hundred twenty thousand, nine hundred four".