1440991490 has 32 divisors (see below), whose sum is σ = 2671802496. Its totient is φ = 559238400.

The previous prime is 1440991477. The next prime is 1440991511. The reversal of 1440991490 is 941990441.

It is a happy number.

It is a Curzon 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, 53834 + ... + 76026.

It is an arithmetic number, because the mean of its divisors is an integer number (83493828).

Almost surely, 2^1440991490 is an apocalyptic number.

1440991490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1440991490 is a deficient number, since it is larger than the sum of its proper divisors (1230811006).

1440991490 is a wasteful number, since it uses less digits than its factorization.

1440991490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22394.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1440991490 is about 37960.3937018572. The cubic root of 1440991490 is about 1129.5023495888.

The spelling of 1440991490 in words is "one billion, four hundred forty million, nine hundred ninety-one thousand, four hundred ninety".