1138240 has 28 divisors (see below), whose sum is σ = 2711196. Its totient is φ = 455168.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138240 is 428311.

It can be written as a sum of positive squares in 2 ways, for example, as 262144 + 876096 = 512^2 + 936^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459 + ... + 2098.

2^1138240 is an apocalyptic number.

1138240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138240 is an abundant number, since it is smaller than the sum of its proper divisors (1572956).

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

1138240 is an equidigital number, since it uses as much as digits as its factorization.

1138240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3574 (or 3564 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1138240 is about 1066.8833113326. The cubic root of 1138240 is about 104.4106055393.

It can be divided in two parts, 1138 and 240, that added together give a triangular number (1378 = T₅₂).

The spelling of 1138240 in words is "one million, one hundred thirty-eight thousand, two hundred forty".