2254942640 has 20 divisors (see below), whose sum is σ = 5242741824. Its totient is φ = 901977024.

The previous prime is 2254942639. The next prime is 2254942643. The reversal of 2254942640 is 462494522.

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 = 2254942594 and 2254942603.

It is not an unprimeable number, because it can be changed into a prime (2254942643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14093312 + ... + 14093471.

Almost surely, 2^2254942640 is an apocalyptic number.

2254942640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2254942640 is an abundant number, since it is smaller than the sum of its proper divisors (2987799184).

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

2254942640 is a wasteful number, since it uses less digits than its factorization.

2254942640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28186796 (or 28186790 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 2254942640 is about 47486.2363216964. The cubic root of 2254942640 is about 1311.3295050882.

The spelling of 2254942640 in words is "two billion, two hundred fifty-four million, nine hundred forty-two thousand, six hundred forty".