2638935880 has 32 divisors (see below), whose sum is σ = 6785835840. Its totient is φ = 904777920.

The previous prime is 2638935877. The next prime is 2638935967. The reversal of 2638935880 is 885398362.

It is a happy number.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4712106 + ... + 4712665.

It is an arithmetic number, because the mean of its divisors is an integer number (212057370).

Almost surely, 2^2638935880 is an apocalyptic number.

2638935880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638935880 is an abundant number, since it is smaller than the sum of its proper divisors (4146899960).

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

2638935880 is a wasteful number, since it uses less digits than its factorization.

2638935880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9424789 (or 9424785 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The square root of 2638935880 is about 51370.5740672615. The cubic root of 2638935880 is about 1381.8989261084.

The spelling of 2638935880 in words is "two billion, six hundred thirty-eight million, nine hundred thirty-five thousand, eight hundred eighty".