2638899 has 10 divisors (see below), whose sum is σ = 3942180. Its totient is φ = 1759212.

The previous prime is 2638897. The next prime is 2638901. The reversal of 2638899 is 9988362.

2638899 is a `hidden beast` number, since 2 + 638 + 8 + 9 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (2638897) and next prime (2638901).

It is not a de Polignac number, because 2638899 - 2¹ = 2638897 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6⁴ + 3¹² + 8 + 8⁷ + 9² + 9³ .

It is not an unprimeable number, because it can be changed into a prime (2638897) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16209 + ... + 16370.

It is an arithmetic number, because the mean of its divisors is an integer number (394218).

2^2638899 is an apocalyptic number.

2638899 is a deficient number, since it is larger than the sum of its proper divisors (1303281).

2638899 is an equidigital number, since it uses as much as digits as its factorization.

2638899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32591 (or 32582 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 2638899 is about 1624.4688362662. The cubic root of 2638899 is about 138.1892488580.

The spelling of 2638899 in words is "two million, six hundred thirty-eight thousand, eight hundred ninety-nine".