1491932864 has 28 divisors (see below), whose sum is σ = 2962893744. Its totient is φ = 745377024.

The previous prime is 1491932861. The next prime is 1491932873. The reversal of 1491932864 is 4682391941.

It is not an unprimeable number, because it can be changed into a prime (1491932861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78962 + ... + 96014.

Almost surely, 2^1491932864 is an apocalyptic number.

It is an amenable number.

1491932864 is a deficient number, since it is larger than the sum of its proper divisors (1470960880).

1491932864 is a wasteful number, since it uses less digits than its factorization.

1491932864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18432 (or 18422 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 1491932864 is about 38625.5467793014. The cubic root of 1491932864 is about 1142.6584270214.

The spelling of 1491932864 in words is "one billion, four hundred ninety-one million, nine hundred thirty-two thousand, eight hundred sixty-four".