1057999872 has 88 divisors (see below), whose sum is σ = 2829772800. Its totient is φ = 351440896.

The previous prime is 1057999861. The next prime is 1057999883. The reversal of 1057999872 is 2789997501.

It is an interprime number because it is at equal distance from previous prime (1057999861) and next prime (1057999883).

It is a super-2 number, since 2×1057999872² = 2238727458304032768, which contains 22 as substring.

It is a zygodrome in base 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, 1471129 + ... + 1471847.

Almost surely, 2^1057999872 is an apocalyptic number.

1057999872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1057999872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414886400).

1057999872 is an abundant number, since it is smaller than the sum of its proper divisors (1771772928).

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

1057999872 is an equidigital number, since it uses as much as digits as its factorization.

1057999872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 57.

The square root of 1057999872 is about 32526.9099669796. The cubic root of 1057999872 is about 1018.9711116682.

The spelling of 1057999872 in words is "one billion, fifty-seven million, nine hundred ninety-nine thousand, eight hundred seventy-two".