2257243640 has 16 divisors (see below), whose sum is σ = 5078798280. Its totient is φ = 902897440.

The previous prime is 2257243619. The next prime is 2257243669. The reversal of 2257243640 is 463427522.

2257243640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2257243640.

It is a congruent number.

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, 28215506 + ... + 28215585.

Almost surely, 2^2257243640 is an apocalyptic number.

2257243640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2257243640 is an abundant number, since it is smaller than the sum of its proper divisors (2821554640).

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

2257243640 is a wasteful number, since it uses less digits than its factorization.

2257243640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56431102 (or 56431098 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 2257243640 is about 47510.4582171126. The cubic root of 2257243640 is about 1311.7753912919.

The spelling of 2257243640 in words is "two billion, two hundred fifty-seven million, two hundred forty-three thousand, six hundred forty".