1491611232 has 24 divisors (see below), whose sum is σ = 3915479736. Its totient is φ = 497203712.

The previous prime is 1491611227. The next prime is 1491611287. The reversal of 1491611232 is 2321161941.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1491611232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7768713 + ... + 7768904.

It is an arithmetic number, because the mean of its divisors is an integer number (163144989).

Almost surely, 2^1491611232 is an apocalyptic number.

1491611232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1491611232 is an abundant number, since it is smaller than the sum of its proper divisors (2423868504).

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

1491611232 is a wasteful number, since it uses less digits than its factorization.

1491611232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15537630 (or 15537622 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 1491611232 is about 38621.3830927894. The cubic root of 1491611232 is about 1142.5763094014.

The spelling of 1491611232 in words is "one billion, four hundred ninety-one million, six hundred eleven thousand, two hundred thirty-two".