1057681448 has 8 divisors (see below), whose sum is σ = 1983152730. Its totient is φ = 528840720.

The previous prime is 1057681447. The next prime is 1057681453. The reversal of 1057681448 is 8441867501.

It can be written as a sum of positive squares in only one way, i.e., 659359684 + 398321764 = 25678^2 + 19958^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1057681448² = 2237380090886753408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1057681399 and 1057681408.

It is not an unprimeable number, because it can be changed into a prime (1057681447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66105083 + ... + 66105098.

Almost surely, 2^1057681448 is an apocalyptic number.

It is an amenable number.

1057681448 is a deficient number, since it is larger than the sum of its proper divisors (925471282).

1057681448 is a wasteful number, since it uses less digits than its factorization.

1057681448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132210187 (or 132210183 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 1057681448 is about 32522.0148207334. The cubic root of 1057681448 is about 1018.8688755456.

The spelling of 1057681448 in words is "one billion, fifty-seven million, six hundred eighty-one thousand, four hundred forty-eight".