2636318628 has 72 divisors (see below), whose sum is σ = 7055630400. Its totient is φ = 827672256.

The previous prime is 2636318621. The next prime is 2636318669. The reversal of 2636318628 is 8268136362.

It is a happy number.

2636318628 is a `hidden beast` number, since 2 + 6 + 3 + 6 + 3 + 18 + 628 = 666.

It is not an unprimeable number, because it can be changed into a prime (2636318621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107193 + ... + 129471.

Almost surely, 2^2636318628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2636318628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3527815200).

2636318628 is an abundant number, since it is smaller than the sum of its proper divisors (4419311772).

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

2636318628 is a wasteful number, since it uses less digits than its factorization.

2636318628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22481 (or 22476 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 2636318628 is about 51345.0935143758. The cubic root of 2636318628 is about 1381.4419269948.

The spelling of 2636318628 in words is "two billion, six hundred thirty-six million, three hundred eighteen thousand, six hundred twenty-eight".