2638919970 has 24 divisors (see below), whose sum is σ = 6861192156. Its totient is φ = 703711968.

The previous prime is 2638919953. The next prime is 2638919993. The reversal of 2638919970 is 799198362.

2638919970 is a `hidden beast` number, since 2 + 6 + 389 + 199 + 70 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2631997809 + 6922161 = 51303^2 + 2631^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14660577 + ... + 14660756.

Almost surely, 2^2638919970 is an apocalyptic number.

2638919970 is an abundant number, since it is smaller than the sum of its proper divisors (4222272186).

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

2638919970 is a wasteful number, since it uses less digits than its factorization.

2638919970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29321346 (or 29321343 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 2638919970 is about 51370.4192118382. The cubic root of 2638919970 is about 1381.8961489718.

The spelling of 2638919970 in words is "two billion, six hundred thirty-eight million, nine hundred nineteen thousand, nine hundred seventy".