1440380 has 12 divisors (see below), whose sum is σ = 3024840. Its totient is φ = 576144.

The previous prime is 1440379. The next prime is 1440391. The reversal of 1440380 is 830441.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 72019 = 1440380 / (1 + 4 + 4 + 0 + 3 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35990 + ... + 36029.

It is an arithmetic number, because the mean of its divisors is an integer number (252070).

2^1440380 is an apocalyptic number.

1440380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440380 is an abundant number, since it is smaller than the sum of its proper divisors (1584460).

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

1440380 is a wasteful number, since it uses less digits than its factorization.

1440380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72028 (or 72026 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1440380 is about 1200.1583228891. The cubic root of 1440380 is about 112.9342557502.

The spelling of 1440380 in words is "one million, four hundred forty thousand, three hundred eighty".