1438920 has 96 divisors (see below), whose sum is σ = 5353920. Its totient is φ = 328320.

The previous prime is 1438919. The next prime is 1438933. The reversal of 1438920 is 298341.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2235 + ... + 2805.

It is an arithmetic number, because the mean of its divisors is an integer number (55770).

2^1438920 is an apocalyptic number.

1438920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2676960).

1438920 is an abundant number, since it is smaller than the sum of its proper divisors (3915000).

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

1438920 is a wasteful number, since it uses less digits than its factorization.

1438920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1438920 is about 1199.5499155933. The cubic root of 1438920 is about 112.8960853241.

The spelling of 1438920 in words is "one million, four hundred thirty-eight thousand, nine hundred twenty".