1491982080 has 144 divisors (see below), whose sum is σ = 4894268064. Its totient is φ = 387072000.

The previous prime is 1491982073. The next prime is 1491982133. The reversal of 1491982080 is 802891941.

It is a super-2 number, since 2×1491982080² = 4452021054082252800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136830 + ... + 147330.

Almost surely, 2^1491982080 is an apocalyptic number.

1491982080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491982080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2447134032).

1491982080 is an abundant number, since it is smaller than the sum of its proper divisors (3402285984).

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

1491982080 is a wasteful number, since it uses less digits than its factorization.

1491982080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10562 (or 10548 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 1491982080 is about 38626.1838653523. The cubic root of 1491982080 is about 1142.6709915856.

The spelling of 1491982080 in words is "one billion, four hundred ninety-one million, nine hundred eighty-two thousand, eighty".