2638990550 has 48 divisors (see below), whose sum is σ = 5724261600. Its totient is φ = 904790880.

The previous prime is 2638990547. The next prime is 2638990567. The reversal of 2638990550 is 550998362.

It is a super-2 number, since 2×2638990550² = 13928542245978605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2638990495 and 2638990504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59789 + ... + 94088.

It is an arithmetic number, because the mean of its divisors is an integer number (119255450).

Almost surely, 2^2638990550 is an apocalyptic number.

2638990550 is an abundant number, since it is smaller than the sum of its proper divisors (3085271050).

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

2638990550 is a wasteful number, since it uses less digits than its factorization.

2638990550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153910 (or 153891 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 2638990550 is about 51371.1061784735. The cubic root of 2638990550 is about 1381.9084688301.

The spelling of 2638990550 in words is "two billion, six hundred thirty-eight million, nine hundred ninety thousand, five hundred fifty".