1439990 has 8 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 575992.

The previous prime is 1439989. The next prime is 1440011. The reversal of 1439990 is 999341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1439990.

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, 71990 + ... + 72009.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

2^1439990 is an apocalyptic number.

1439990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1439990 is a deficient number, since it is larger than the sum of its proper divisors (1152010).

1439990 is a wasteful number, since it uses less digits than its factorization.

1439990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144006.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 1439990 is about 1199.9958333261. The cubic root of 1439990 is about 112.9240620662.

It can be divided in two parts, 14 and 39990, that added together give a palindrome (40004).

The spelling of 1439990 in words is "one million, four hundred thirty-nine thousand, nine hundred ninety".