655971140 has 48 divisors (see below), whose sum is σ = 1504730304. Its totient is φ = 238224000.

The previous prime is 655971139. The next prime is 655971167. The reversal of 655971140 is 41179556.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 655971094 and 655971103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229802 + ... + 232638.

It is an arithmetic number, because the mean of its divisors is an integer number (31348548).

Almost surely, 2^655971140 is an apocalyptic number.

It is an amenable number.

655971140 is an abundant number, since it is smaller than the sum of its proper divisors (848759164).

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

655971140 is a wasteful number, since it uses less digits than its factorization.

655971140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 655971140 is about 25611.9335466887. The cubic root of 655971140 is about 868.8835549206.

The spelling of 655971140 in words is "six hundred fifty-five million, nine hundred seventy-one thousand, one hundred forty".