2646904 has 32 divisors (see below), whose sum is σ = 5523840. Its totient is φ = 1180800.

The previous prime is 2646901. The next prime is 2646923. The reversal of 2646904 is 4096462.

It is a super-2 number, since 2×2646904² = 14012201570432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2814 + ... + 3634.

It is an arithmetic number, because the mean of its divisors is an integer number (172620).

2^2646904 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 2646904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2761920).

2646904 is an abundant number, since it is smaller than the sum of its proper divisors (2876936).

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

2646904 is a wasteful number, since it uses less digits than its factorization.

2646904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2646904 is about 1626.9308528638. The cubic root of 2646904 is about 138.3288384211.

The spelling of 2646904 in words is "two million, six hundred forty-six thousand, nine hundred four".