2638780436 has 24 divisors (see below), whose sum is σ = 4682832000. Its totient is φ = 1300875264.

The previous prime is 2638780411. The next prime is 2638780453. The reversal of 2638780436 is 6340878362.

It is a congruent number.

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, 237575 + ... + 248433.

It is an arithmetic number, because the mean of its divisors is an integer number (195118000).

Almost surely, 2^2638780436 is an apocalyptic number.

It is an amenable number.

2638780436 is a deficient number, since it is larger than the sum of its proper divisors (2044051564).

2638780436 is a wasteful number, since it uses less digits than its factorization.

2638780436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711 (or 11709 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The square root of 2638780436 is about 51369.0610776565. The cubic root of 2638780436 is about 1381.8717924297.

The spelling of 2638780436 in words is "two billion, six hundred thirty-eight million, seven hundred eighty thousand, four hundred thirty-six".