1657970140 has 12 divisors (see below), whose sum is σ = 3481737336. Its totient is φ = 663188048.

The previous prime is 1657970131. The next prime is 1657970161. The reversal of 1657970140 is 410797561.

It is a junction number, because it is equal to n+sod(n) for n = 1657970093 and 1657970102.

It is a congruent number.

It is an unprimeable number.

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, 41449234 + ... + 41449273.

It is an arithmetic number, because the mean of its divisors is an integer number (290144778).

Almost surely, 2^1657970140 is an apocalyptic number.

1657970140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1657970140 is an abundant number, since it is smaller than the sum of its proper divisors (1823767196).

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

1657970140 is a wasteful number, since it uses less digits than its factorization.

1657970140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82898516 (or 82898514 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1657970140 is about 40718.1794779678. The cubic root of 1657970140 is about 1183.5653298137.

The spelling of 1657970140 in words is "one billion, six hundred fifty-seven million, nine hundred seventy thousand, one hundred forty".