1440231023 has 16 divisors (see below), whose sum is σ = 1817254656. Its totient is φ = 1108731840.

The previous prime is 1440230993. The next prime is 1440231029. The reversal of 1440231023 is 3201320441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440231023 is a prime.

It is a super-2 number, since 2×1440231023² = 4148530799223253058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1440230986 and 1440231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440231029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106286 + ... + 119067.

It is an arithmetic number, because the mean of its divisors is an integer number (113578416).

Almost surely, 2^1440231023 is an apocalyptic number.

1440231023 is a deficient number, since it is larger than the sum of its proper divisors (377023633).

1440231023 is a wasteful number, since it uses less digits than its factorization.

1440231023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225454.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1440231023 is about 37950.3757952408. The cubic root of 1440231023 is about 1129.3036205854.

Adding to 1440231023 its reverse (3201320441), we get a palindrome (4641551464).

The spelling of 1440231023 in words is "one billion, four hundred forty million, two hundred thirty-one thousand, twenty-three".