1440575840 has 48 divisors (see below), whose sum is σ = 3712761360. Its totient is φ = 523845120.

The previous prime is 1440575837. The next prime is 1440575849. The reversal of 1440575840 is 485750441.

It is a junction number, because it is equal to n+sod(n) for n = 1440575794 and 1440575803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440575849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407495 + ... + 411014.

It is an arithmetic number, because the mean of its divisors is an integer number (77349195).

Almost surely, 2^1440575840 is an apocalyptic number.

1440575840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440575840 is an abundant number, since it is smaller than the sum of its proper divisors (2272185520).

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

1440575840 is a wasteful number, since it uses less digits than its factorization.

1440575840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818535 (or 818527 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 38.

The square root of 1440575840 is about 37954.9185218464. The cubic root of 1440575840 is about 1129.3937385382.

The spelling of 1440575840 in words is "one billion, four hundred forty million, five hundred seventy-five thousand, eight hundred forty".