2256747280 has 40 divisors (see below), whose sum is σ = 5555584152. Its totient is φ = 849598464.

The previous prime is 2256747271. The next prime is 2256747307. The reversal of 2256747280 is 827476522.

It can be written as a sum of positive squares in 4 ways, for example, as 136328976 + 2120418304 = 11676^2 + 46048^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 828327 + ... + 831046.

Almost surely, 2^2256747280 is an apocalyptic number.

2256747280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2256747280 is an abundant number, since it is smaller than the sum of its proper divisors (3298836872).

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

2256747280 is a wasteful number, since it uses less digits than its factorization.

2256747280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659403 (or 1659397 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 2256747280 is about 47505.2342379237. The cubic root of 2256747280 is about 1311.6792326328.

The spelling of 2256747280 in words is "two billion, two hundred fifty-six million, seven hundred forty-seven thousand, two hundred eighty".