1057668646 has 8 divisors (see below), whose sum is σ = 1587281904. Its totient is φ = 528574680.

The previous prime is 1057668641. The next prime is 1057668659. The reversal of 1057668646 is 6468667501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1057668646² = 2237325929462946632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1057668646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057668641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124690 + ... + 132901.

It is an arithmetic number, because the mean of its divisors is an integer number (198410238).

Almost surely, 2^1057668646 is an apocalyptic number.

1057668646 is a deficient number, since it is larger than the sum of its proper divisors (529613258).

1057668646 is a wasteful number, since it uses less digits than its factorization.

1057668646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259646.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 1057668646 is about 32521.8179996137. The cubic root of 1057668646 is about 1018.8647647894.

The spelling of 1057668646 in words is "one billion, fifty-seven million, six hundred sixty-eight thousand, six hundred forty-six".