1491037140 has 24 divisors (see below), whose sum is σ = 4174904160. Its totient is φ = 397609888.

The previous prime is 1491037129. The next prime is 1491037159. The reversal of 1491037140 is 417301941.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1491037098 and 1491037107.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12425250 + ... + 12425369.

It is an arithmetic number, because the mean of its divisors is an integer number (173954340).

Almost surely, 2^1491037140 is an apocalyptic number.

1491037140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491037140 is an abundant number, since it is smaller than the sum of its proper divisors (2683867020).

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

1491037140 is a wasteful number, since it uses less digits than its factorization.

1491037140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24850631 (or 24850629 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1491037140 is about 38613.9500698905. The cubic root of 1491037140 is about 1142.4297054973.

The spelling of 1491037140 in words is "one billion, four hundred ninety-one million, thirty-seven thousand, one hundred forty".