1020859660 has 24 divisors (see below), whose sum is σ = 2158009056. Its totient is φ = 405638400.

The previous prime is 1020859657. The next prime is 1020859661. The reversal of 1020859660 is 669580201.

It is not an unprimeable number, because it can be changed into a prime (1020859661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165997 + ... + 172036.

It is an arithmetic number, because the mean of its divisors is an integer number (89917044).

Almost surely, 2^1020859660 is an apocalyptic number.

1020859660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020859660 is an abundant number, since it is smaller than the sum of its proper divisors (1137149396).

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

1020859660 is a wasteful number, since it uses less digits than its factorization.

1020859660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338193 (or 338191 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1020859660 is about 31950.8945101698. The cubic root of 1020859660 is about 1006.9054253394.

The spelling of 1020859660 in words is "one billion, twenty million, eight hundred fifty-nine thousand, six hundred sixty".