2257647380 has 24 divisors (see below), whose sum is σ = 4742274600. Its totient is φ = 902827520.

The previous prime is 2257647373. The next prime is 2257647401. The reversal of 2257647380 is 837467522.

It can be written as a sum of positive squares in 4 ways, for example, as 1452676996 + 804970384 = 38114^2 + 28372^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80840 + ... + 105120.

It is an arithmetic number, because the mean of its divisors is an integer number (197594775).

Almost surely, 2^2257647380 is an apocalyptic number.

2257647380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2257647380 is an abundant number, since it is smaller than the sum of its proper divisors (2484627220).

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

2257647380 is a wasteful number, since it uses less digits than its factorization.

2257647380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28939 (or 28937 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The square root of 2257647380 is about 47514.7069863637. The cubic root of 2257647380 is about 1311.8535964996.

The spelling of 2257647380 in words is "two billion, two hundred fifty-seven million, six hundred forty-seven thousand, three hundred eighty".