1491813376 has 99 divisors (see below), whose sum is σ = 3213157477. Its totient is φ = 692142080.

The previous prime is 1491813311. The next prime is 1491813391. The reversal of 1491813376 is 6733181941.

The square root of 1491813376 is 38624.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1161446400 + 330366976 = 34080^2 + 18176^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21011421 + ... + 21011491.

Almost surely, 2^1491813376 is an apocalyptic number.

1491813376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1491813376 is the 38624-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491813376

1491813376 is an abundant number, since it is smaller than the sum of its proper divisors (1721344101).

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

1491813376 is an frugal number, since it uses more digits than its factorization.

1491813376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 90 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The cubic root of 1491813376 is about 1142.6279212664.

The spelling of 1491813376 in words is "one billion, four hundred ninety-one million, eight hundred thirteen thousand, three hundred seventy-six".