1491898400 has 36 divisors (see below), whose sum is σ = 3642098922. Its totient is φ = 596759040.

The previous prime is 1491898399. The next prime is 1491898403. The reversal of 1491898400 is 48981941.

It can be written as a sum of positive squares in 3 ways, for example, as 1120642576 + 371255824 = 33476^2 + 19268^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1491898403) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 931637 + ... + 933236.

Almost surely, 2^1491898400 is an apocalyptic number.

1491898400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491898400 is an abundant number, since it is smaller than the sum of its proper divisors (2150200522).

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

1491898400 is a wasteful number, since it uses less digits than its factorization.

1491898400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864893 (or 1864880 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 1491898400 is about 38625.1006471181. The cubic root of 1491898400 is about 1142.6496283942.

The spelling of 1491898400 in words is "one billion, four hundred ninety-one million, eight hundred ninety-eight thousand, four hundred".