2638489356 has 48 divisors (see below), whose sum is σ = 6878793600. Its totient is φ = 874576656.

The previous prime is 2638489307. The next prime is 2638489363. The reversal of 2638489356 is 6539848362.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48910 + ... + 87573.

It is an arithmetic number, because the mean of its divisors is an integer number (143308200).

Almost surely, 2^2638489356 is an apocalyptic number.

It is an amenable number.

2638489356 is an abundant number, since it is smaller than the sum of its proper divisors (4240304244).

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

2638489356 is a wasteful number, since it uses less digits than its factorization.

2638489356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136675 (or 136667 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The square root of 2638489356 is about 51366.2277766238. The cubic root of 2638489356 is about 1381.8209798110.

The spelling of 2638489356 in words is "two billion, six hundred thirty-eight million, four hundred eighty-nine thousand, three hundred fifty-six".