2638255340 has 48 divisors (see below), whose sum is σ = 6394538304. Its totient is φ = 895584000.

The previous prime is 2638255337. The next prime is 2638255343. The reversal of 2638255340 is 435528362.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2638255337) and next prime (2638255343).

It is a junction number, because it is equal to n+sod(n) for n = 2638255294 and 2638255303.

It is not an unprimeable number, because it can be changed into a prime (2638255343) 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, 79151 + ... + 107430.

It is an arithmetic number, because the mean of its divisors is an integer number (133219548).

Almost surely, 2^2638255340 is an apocalyptic number.

2638255340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638255340 is an abundant number, since it is smaller than the sum of its proper divisors (3756282964).

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

2638255340 is a wasteful number, since it uses less digits than its factorization.

2638255340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186698 (or 186696 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 2638255340 is about 51363.9498091804. The cubic root of 2638255340 is about 1381.7801259062.

The spelling of 2638255340 in words is "two billion, six hundred thirty-eight million, two hundred fifty-five thousand, three hundred forty".