1057043640 has 64 divisors (see below), whose sum is σ = 3173657760. Its totient is φ = 281653760.

The previous prime is 1057043633. The next prime is 1057043651. The reversal of 1057043640 is 463407501.

It is a super-2 number, since 2×1057043640² = 2234682513728899200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1057043598 and 1057043607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193750 + ... + 199130.

Almost surely, 2^1057043640 is an apocalyptic number.

1057043640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1057043640 is an abundant number, since it is smaller than the sum of its proper divisors (2116614120).

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

1057043640 is a wasteful number, since it uses less digits than its factorization.

1057043640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032 (or 7028 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1057043640 is about 32512.2075534714. The cubic root of 1057043640 is about 1018.6640333446.

The spelling of 1057043640 in words is "one billion, fifty-seven million, forty-three thousand, six hundred forty".