1440648 has 96 divisors (see below), whose sum is σ = 4548960. Its totient is φ = 407040.

The previous prime is 1440641. The next prime is 1440679. The reversal of 1440648 is 8460441.

1440648 is a `hidden beast` number, since 14 + 4 + 0 + 648 = 666.

It is a super-3 number, since 3×1440648³ = 8970050677972133376, which contains 333 as substring.

1440648 is a modest number, since divided by 648 gives 144 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1440641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13411 + ... + 13517.

It is an arithmetic number, because the mean of its divisors is an integer number (47385).

2^1440648 is an apocalyptic number.

1440648 is a gapful number since it is divisible by the number (18) 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 1440648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2274480).

1440648 is an abundant number, since it is smaller than the sum of its proper divisors (3108312).

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

1440648 is a wasteful number, since it uses less digits than its factorization.

1440648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1440648 is about 1200.2699696318. The cubic root of 1440648 is about 112.9412595741.

The spelling of 1440648 in words is "one million, four hundred forty thousand, six hundred forty-eight".