1440097920 has 128 divisors (see below), whose sum is σ = 5100408000. Its totient is φ = 384021504.

The previous prime is 1440097889. The next prime is 1440097961. The reversal of 1440097920 is 297900441.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24390 + ... + 58949.

Almost surely, 2^1440097920 is an apocalyptic number.

1440097920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440097920 is an abundant number, since it is smaller than the sum of its proper divisors (3660310080).

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

1440097920 is an equidigital number, since it uses as much as digits as its factorization.

1440097920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83367 (or 83349 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1440097920 is about 37948.6221093731. The cubic root of 1440097920 is about 1129.2688302571.

The spelling of 1440097920 in words is "one billion, four hundred forty million, ninety-seven thousand, nine hundred twenty".