2638436628 has 48 divisors (see below), whose sum is σ = 6505390080. Its totient is φ = 830585184.

The previous prime is 2638436627. The next prime is 2638436657. The reversal of 2638436628 is 8266348362.

It is a super-2 number, since 2×2638436628² = 13922695679944020768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638436623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38700 + ... + 82307.

It is an arithmetic number, because the mean of its divisors is an integer number (135528960).

Almost surely, 2^2638436628 is an apocalyptic number.

It is an amenable number.

2638436628 is an abundant number, since it is smaller than the sum of its proper divisors (3866953452).

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

2638436628 is a wasteful number, since it uses less digits than its factorization.

2638436628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121116 (or 121114 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 48.

The square root of 2638436628 is about 51365.7145185385. The cubic root of 2638436628 is about 1381.8117749047.

The spelling of 2638436628 in words is "two billion, six hundred thirty-eight million, four hundred thirty-six thousand, six hundred twenty-eight".