1438040 has 16 divisors (see below), whose sum is σ = 3235680. Its totient is φ = 575200.

The previous prime is 1438033. The next prime is 1438057. The reversal of 1438040 is 408341.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 17936 + ... + 18015.

It is an arithmetic number, because the mean of its divisors is an integer number (202230).

2^1438040 is an apocalyptic number.

1438040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438040 is an abundant number, since it is smaller than the sum of its proper divisors (1797640).

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

1438040 is a wasteful number, since it uses less digits than its factorization.

1438040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35962 (or 35958 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1438040 is about 1199.1830552505. The cubic root of 1438040 is about 112.8730660192.

The spelling of 1438040 in words is "one million, four hundred thirty-eight thousand, forty".