1440464 has 20 divisors (see below), whose sum is σ = 2811204. Its totient is φ = 715008.

The previous prime is 1440449. The next prime is 1440469. The reversal of 1440464 is 4640441.

It can be written as a sum of positive squares in 2 ways, for example, as 1345600 + 94864 = 1160^2 + 308^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924 + ... + 3380.

2^1440464 is an apocalyptic number.

It is an amenable number.

1440464 is a deficient number, since it is larger than the sum of its proper divisors (1370740).

1440464 is a wasteful number, since it uses less digits than its factorization.

1440464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1440464 is about 1200.1933177618. The cubic root of 1440464 is about 112.9364510720.

Subtracting from 1440464 its sum of digits (23), we obtain a palindrome (1440441).

The spelling of 1440464 in words is "one million, four hundred forty thousand, four hundred sixty-four".