1438990 has 32 divisors (see below), whose sum is σ = 3017664. Its totient is φ = 483840.

The previous prime is 1438979. The next prime is 1438991. The reversal of 1438990 is 998341.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4102 + ... + 4438.

It is an arithmetic number, because the mean of its divisors is an integer number (94302).

2^1438990 is an apocalyptic number.

1438990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1438990 is an abundant number, since it is smaller than the sum of its proper divisors (1578674).

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

1438990 is a wasteful number, since it uses less digits than its factorization.

1438990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1438990 is about 1199.5790928488. The cubic root of 1438990 is about 112.8979160022.

The spelling of 1438990 in words is "one million, four hundred thirty-eight thousand, nine hundred ninety".