1440740 has 48 divisors (see below), whose sum is σ = 3556224. Its totient is φ = 480000.

The previous prime is 1440737. The next prime is 1440763. The reversal of 1440740 is 470441.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 5615 + ... + 5865.

It is an arithmetic number, because the mean of its divisors is an integer number (74088).

2^1440740 is an apocalyptic number.

1440740 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 1440740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778112).

1440740 is an abundant number, since it is smaller than the sum of its proper divisors (2115484).

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

1440740 is a wasteful number, since it uses less digits than its factorization.

1440740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1440740 is about 1200.3082937312. The cubic root of 1440740 is about 112.9436636716.

Subtracting from 1440740 its reverse (470441), we obtain a cube (970299 = 99³).

The spelling of 1440740 in words is "one million, four hundred forty thousand, seven hundred forty".