1438940 has 12 divisors (see below), whose sum is σ = 3021816. Its totient is φ = 575568.

The previous prime is 1438939. The next prime is 1438961. The reversal of 1438940 is 498341.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 35954 + ... + 35993.

It is an arithmetic number, because the mean of its divisors is an integer number (251818).

2^1438940 is an apocalyptic number.

1438940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438940 is an abundant number, since it is smaller than the sum of its proper divisors (1582876).

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

1438940 is a wasteful number, since it uses less digits than its factorization.

1438940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71956 (or 71954 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1438940 is about 1199.5582520245. The cubic root of 1438940 is about 112.8966083811.

The spelling of 1438940 in words is "one million, four hundred thirty-eight thousand, nine hundred forty".