1238240 has 48 divisors (see below), whose sum is σ = 2993760. Its totient is φ = 483840.

The previous prime is 1238219. The next prime is 1238267. The reversal of 1238240 is 428321.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11306 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (62370).

2^1238240 is an apocalyptic number.

1238240 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 1238240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496880).

1238240 is an abundant number, since it is smaller than the sum of its proper divisors (1755520).

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

1238240 is a wasteful number, since it uses less digits than its factorization.

1238240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 187 counting only the distinct ones).

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

The square root of 1238240 is about 1112.7623286219. The cubic root of 1238240 is about 107.3828541812.

The spelling of 1238240 in words is "one million, two hundred thirty-eight thousand, two hundred forty".