1057891250 has 40 divisors (see below), whose sum is σ = 2135475804. Its totient is φ = 390600000.

The previous prime is 1057891229. The next prime is 1057891259. The reversal of 1057891250 is 521987501.

It can be written as a sum of positive squares in 10 ways, for example, as 85137529 + 972753721 = 9227^2 + 31189^2 .

It is a super-2 number, since 2×1057891250² = 2238267793653125000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1057891259) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16301 + ... + 48800.

Almost surely, 2^1057891250 is an apocalyptic number.

1057891250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1057891250 is an abundant number, since it is smaller than the sum of its proper divisors (1077584554).

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

1057891250 is an equidigital number, since it uses as much as digits as its factorization.

1057891250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65136 (or 65121 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 1057891250 is about 32525.2401989593. The cubic root of 1057891250 is about 1018.9362388007.

The spelling of 1057891250 in words is "one billion, fifty-seven million, eight hundred ninety-one thousand, two hundred fifty".