2638460 has 48 divisors (see below), whose sum is σ = 6168960. Its totient is φ = 939840.

The previous prime is 2638411. The next prime is 2638469. The reversal of 2638460 is 648362.

It is a super-2 number, since 2×2638460² = 13922942343200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638469) 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, 14651 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2^2638460 is an apocalyptic number.

2638460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2638460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3084480).

2638460 is an abundant number, since it is smaller than the sum of its proper divisors (3530500).

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

2638460 is a wasteful number, since it uses less digits than its factorization.

2638460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2638460 is about 1624.3337095560. Note that the first 3 decimals coincide. The cubic root of 2638460 is about 138.1815855049.

The spelling of 2638460 in words is "two million, six hundred thirty-eight thousand, four hundred sixty".