2638456 has 16 divisors (see below), whose sum is σ = 4969440. Its totient is φ = 1313280.

The previous prime is 2638411. The next prime is 2638469. The reversal of 2638456 is 6548362.

It is a happy number.

It is a super-2 number, since 2×2638456² = 13922900127872, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁶ + 3⁷ + 8 + 4⁸ + 5⁹ + 6⁶ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (310590).

2^2638456 is an apocalyptic number.

It is an amenable number.

2638456 is a deficient number, since it is larger than the sum of its proper divisors (2330984).

2638456 is a wasteful number, since it uses less digits than its factorization.

2638456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494 (or 1490 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 2638456 is about 1624.3324782815. The cubic root of 2638456 is about 138.1815156755.

The spelling of 2638456 in words is "two million, six hundred thirty-eight thousand, four hundred fifty-six".