1491585860 has 24 divisors (see below), whose sum is σ = 3135922776. Its totient is φ = 595950080.

The previous prime is 1491585853. The next prime is 1491585881. The reversal of 1491585860 is 685851941.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28217344 + 1463368516 = 5312^2 + 38254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24707 + ... + 59946.

It is an arithmetic number, because the mean of its divisors is an integer number (130663449).

Almost surely, 2^1491585860 is an apocalyptic number.

1491585860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491585860 is an abundant number, since it is smaller than the sum of its proper divisors (1644336916).

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

1491585860 is a wasteful number, since it uses less digits than its factorization.

1491585860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85543 (or 85541 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 1491585860 is about 38621.0546205046. The cubic root of 1491585860 is about 1142.5698310354.

The spelling of 1491585860 in words is "one billion, four hundred ninety-one million, five hundred eighty-five thousand, eight hundred sixty".