1440890 has 16 divisors (see below), whose sum is σ = 2829600. Its totient is φ = 523920.

The previous prime is 1440889. The next prime is 1440913. The reversal of 1440890 is 980441.

1440890 = 341² + 342² + ... + 352².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6440 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (176850).

2^1440890 is an apocalyptic number.

1440890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1440890 is a deficient number, since it is larger than the sum of its proper divisors (1388710).

1440890 is a wasteful number, since it uses less digits than its factorization.

1440890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13117.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1440890 is about 1200.3707760521. The cubic root of 1440890 is about 112.9475831763.

It can be divided in two parts, 14 and 40890, that added together give a palindrome (40904).

The spelling of 1440890 in words is "one million, four hundred forty thousand, eight hundred ninety".