2538891440 has 20 divisors (see below), whose sum is σ = 5902922784. Its totient is φ = 1015556544.

The previous prime is 2538891427. The next prime is 2538891451. The reversal of 2538891440 is 441988352.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2538891391 and 2538891400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15867992 + ... + 15868151.

Almost surely, 2^2538891440 is an apocalyptic number.

2538891440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2538891440 is an abundant number, since it is smaller than the sum of its proper divisors (3364031344).

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

2538891440 is a wasteful number, since it uses less digits than its factorization.

2538891440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31736156 (or 31736150 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 2538891440 is about 50387.4135077402. The cubic root of 2538891440 is about 1364.2104662290.

The spelling of 2538891440 in words is "two billion, five hundred thirty-eight million, eight hundred ninety-one thousand, four hundred forty".