1456440 has 64 divisors (see below), whose sum is σ = 4471200. Its totient is φ = 379392.

The previous prime is 1456439. The next prime is 1456451. The reversal of 1456440 is 446541.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1456440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246 + ... + 6474.

2^1456440 is an apocalyptic number.

1456440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1456440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235600).

1456440 is an abundant number, since it is smaller than the sum of its proper divisors (3014760).

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

1456440 is a wasteful number, since it uses less digits than its factorization.

1456440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1456440 is about 1206.8305597722. The cubic root of 1456440 is about 113.3524381480.

The spelling of 1456440 in words is "one million, four hundred fifty-six thousand, four hundred forty".