1491589604 has 24 divisors (see below), whose sum is σ = 2771996640. Its totient is φ = 700285824.

The previous prime is 1491589591. The next prime is 1491589607. The reversal of 1491589604 is 4069851941.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1491589607) 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, 78254 + ... + 95429.

It is an arithmetic number, because the mean of its divisors is an integer number (115499860).

Almost surely, 2^1491589604 is an apocalyptic number.

It is an amenable number.

1491589604 is a deficient number, since it is larger than the sum of its proper divisors (1280407036).

1491589604 is a wasteful number, since it uses less digits than its factorization.

1491589604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173819 (or 173817 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1491589604 is about 38621.1030914447. The cubic root of 1491589604 is about 1142.5707870152.

The spelling of 1491589604 in words is "one billion, four hundred ninety-one million, five hundred eighty-nine thousand, six hundred four".