1440387 has 18 divisors (see below), whose sum is σ = 2255292. Its totient is φ = 885456.

The previous prime is 1440379. The next prime is 1440391. The reversal of 1440387 is 7830441.

It is not a de Polignac number, because 1440387 - 2³ = 1440379 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1440387.

It is not an unprimeable number, because it can be changed into a prime (1440317) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1048 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (125294).

2^1440387 is an apocalyptic number.

1440387 is a deficient number, since it is larger than the sum of its proper divisors (814905).

1440387 is a wasteful number, since it uses less digits than its factorization.

1440387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1440387 is about 1200.1612391675. The cubic root of 1440387 is about 112.9344386969.

It can be divided in two parts, 14 and 40387, that added together give a square (40401 = 201²).

The spelling of 1440387 in words is "one million, four hundred forty thousand, three hundred eighty-seven".