2638471490 has 16 divisors (see below), whose sum is σ = 4753597752. Its totient is φ = 1054422144.

The previous prime is 2638471487. The next prime is 2638471513. The reversal of 2638471490 is 941748362.

It can be written as a sum of positive squares in 4 ways, for example, as 1595762809 + 1042708681 = 39947^2 + 32291^2 .

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, 109289 + ... + 131228.

Almost surely, 2^2638471490 is an apocalyptic number.

2638471490 is a deficient number, since it is larger than the sum of its proper divisors (2115126262).

2638471490 is a wasteful number, since it uses less digits than its factorization.

2638471490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241621.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 2638471490 is about 51366.0538682893. The cubic root of 2638471490 is about 1381.8178608964.

The spelling of 2638471490 in words is "two billion, six hundred thirty-eight million, four hundred seventy-one thousand, four hundred ninety".