1440265464 has 96 divisors (see below), whose sum is σ = 4263470640. Its totient is φ = 435609600.

The previous prime is 1440265457. The next prime is 1440265469. The reversal of 1440265464 is 4645620441.

It is a super-2 number, since 2×1440265464² = 4148729213582270592, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440265469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 506254 + ... + 509090.

Almost surely, 2^1440265464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440265464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131735320).

1440265464 is an abundant number, since it is smaller than the sum of its proper divisors (2823205176).

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

1440265464 is a wasteful number, since it uses less digits than its factorization.

1440265464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3494 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 1440265464 is about 37950.8295561507. The cubic root of 1440265464 is about 1129.3126223903.

The spelling of 1440265464 in words is "one billion, four hundred forty million, two hundred sixty-five thousand, four hundred sixty-four".