1057447656 has 32 divisors (see below), whose sum is σ = 2937355200. Its totient is φ = 352482480.

The previous prime is 1057447637. The next prime is 1057447661. The reversal of 1057447656 is 6567447501.

1057447656 is a `hidden beast` number, since 1 + 0 + 574 + 4 + 76 + 5 + 6 = 666.

It is a super-2 number, since 2×1057447656² = 2236391090359788672, which contains 22 as substring.

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, 2447580 + ... + 2448011.

It is an arithmetic number, because the mean of its divisors is an integer number (91792350).

Almost surely, 2^1057447656 is an apocalyptic number.

It is an amenable number.

1057447656 is an abundant number, since it is smaller than the sum of its proper divisors (1879907544).

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

1057447656 is a wasteful number, since it uses less digits than its factorization.

1057447656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895606 (or 4895596 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 1057447656 is about 32518.4202568329. The cubic root of 1057447656 is about 1018.7937990830.

The spelling of 1057447656 in words is "one billion, fifty-seven million, four hundred forty-seven thousand, six hundred fifty-six".