1238440 has 32 divisors (see below), whose sum is σ = 3185280. Its totient is φ = 424512.

The previous prime is 1238437. The next prime is 1238449. The reversal of 1238440 is 448321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1932 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (99540).

2^1238440 is an apocalyptic number.

1238440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238440 is an abundant number, since it is smaller than the sum of its proper divisors (1946840).

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

1238440 is a wasteful number, since it uses less digits than its factorization.

1238440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441 (or 4437 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1238440 is about 1112.8521914432. The cubic root of 1238440 is about 107.3886353476.

It can be divided in two parts, 12 and 38440, that multiplied together give a triangular number (461280 = T₉₆₀).

The spelling of 1238440 in words is "one million, two hundred thirty-eight thousand, four hundred forty".