1440090 has 24 divisors (see below), whose sum is σ = 3744468. Its totient is φ = 384000.

The previous prime is 1440079. The next prime is 1440107. The reversal of 1440090 is 900441.

It can be written as a sum of positive squares in 2 ways, for example, as 1418481 + 21609 = 1191^2 + 147^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7911 + ... + 8090.

2^1440090 is an apocalyptic number.

1440090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1440090 is an abundant number, since it is smaller than the sum of its proper divisors (2304378).

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

1440090 is a wasteful number, since it uses less digits than its factorization.

1440090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16014 (or 16011 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1440090 is about 1200.0374994141. The cubic root of 1440090 is about 112.9266760068.

It can be divided in two parts, 14 and 40090, that added together give a palindrome (40104).

The spelling of 1440090 in words is "one million, four hundred forty thousand, ninety".