1491063732 has 36 divisors (see below), whose sum is σ = 3770326560. Its totient is φ = 496856592.

The previous prime is 1491063731. The next prime is 1491063737. The reversal of 1491063732 is 2373601941.

1491063732 is a `hidden beast` number, since 1 + 4 + 9 + 10 + 637 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491063731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156769 + ... + 166007.

Almost surely, 2^1491063732 is an apocalyptic number.

1491063732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1491063732 is an abundant number, since it is smaller than the sum of its proper divisors (2279262828).

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

1491063732 is a wasteful number, since it uses less digits than its factorization.

1491063732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13732 (or 13727 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1491063732 is about 38614.2943998722. The cubic root of 1491063732 is about 1142.4364970362.

The spelling of 1491063732 in words is "one billion, four hundred ninety-one million, sixty-three thousand, seven hundred thirty-two".