1957645770 has 32 divisors (see below), whose sum is σ = 4700004480. Its totient is φ = 521855040.

The previous prime is 1957645763. The next prime is 1957645801. The reversal of 1957645770 is 775467591.

It is a happy 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, 89740 + ... + 109400.

It is an arithmetic number, because the mean of its divisors is an integer number (146875140).

Almost surely, 2^1957645770 is an apocalyptic number.

1957645770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1957645770 is an abundant number, since it is smaller than the sum of its proper divisors (2742358710).

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

1957645770 is a wasteful number, since it uses less digits than its factorization.

1957645770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22990.

The product of its (nonzero) digits is 1852200, while the sum is 51.

The square root of 1957645770 is about 44245.2909358725. The cubic root of 1957645770 is about 1250.9636877871.

The spelling of 1957645770 in words is "one billion, nine hundred fifty-seven million, six hundred forty-five thousand, seven hundred seventy".