1440520240 has 40 divisors (see below), whose sum is σ = 3430905408. Its totient is φ = 562152960.

The previous prime is 1440520217. The next prime is 1440520241. The reversal of 1440520240 is 420250441.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1440520241) 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, 216312 + ... + 222871.

Almost surely, 2^1440520240 is an apocalyptic number.

1440520240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440520240 is an abundant number, since it is smaller than the sum of its proper divisors (1990385168).

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

1440520240 is a wasteful number, since it uses less digits than its factorization.

1440520240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439237 (or 439231 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1440520240 is about 37954.1860668886. The cubic root of 1440520240 is about 1129.3792084459.

Adding to 1440520240 its reverse (420250441), we get a palindrome (1860770681).

The spelling of 1440520240 in words is "one billion, four hundred forty million, five hundred twenty thousand, two hundred forty".