1057640206 has 96 divisors (see below), whose sum is σ = 2040837120. Its totient is φ = 408240000.

The previous prime is 1057640203. The next prime is 1057640239. The reversal of 1057640206 is 6020467501.

It is a happy number.

It is a super-2 number, since 2×1057640206² = 2237205610695444872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057640203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4213581 + ... + 4213831.

It is an arithmetic number, because the mean of its divisors is an integer number (21258720).

Almost surely, 2^1057640206 is an apocalyptic number.

1057640206 is a deficient number, since it is larger than the sum of its proper divisors (983196914).

1057640206 is a wasteful number, since it uses less digits than its factorization.

1057640206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1057640206 is about 32521.3807517455. The cubic root of 1057640206 is about 1018.8556325109.

The spelling of 1057640206 in words is "one billion, fifty-seven million, six hundred forty thousand, two hundred six".