2638455 has 8 divisors (see below), whose sum is σ = 4221552. Its totient is φ = 1407168.

The previous prime is 2638411. The next prime is 2638469. The reversal of 2638455 is 5548362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2638455 - 2⁷ = 2638327 is a prime.

It is a super-2 number, since 2×2638455² = 13922889574050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹² + 6⁷ + 3⁸ + 8⁴ + 4² + 5⁸ + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87934 + ... + 87963.

It is an arithmetic number, because the mean of its divisors is an integer number (527694).

2^2638455 is an apocalyptic number.

2638455 is a deficient number, since it is larger than the sum of its proper divisors (1583097).

2638455 is a wasteful number, since it uses less digits than its factorization.

2638455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175905.

The product of its digits is 28800, while the sum is 33.

The square root of 2638455 is about 1624.3321704627. The cubic root of 2638455 is about 138.1814982181.

The spelling of 2638455 in words is "two million, six hundred thirty-eight thousand, four hundred fifty-five".