1238720 has 84 divisors (see below), whose sum is σ = 3474720. Its totient is φ = 419328.

The previous prime is 1238719. The next prime is 1238747. The reversal of 1238720 is 278321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15641 + ... + 15719.

2^1238720 is an apocalyptic number.

1238720 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 1238720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737360).

1238720 is an abundant number, since it is smaller than the sum of its proper divisors (2236000).

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

1238720 is an equidigital number, since it uses as much as digits as its factorization.

1238720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1238720 is about 1112.9779872037. The cubic root of 1238720 is about 107.3967279351.

The spelling of 1238720 in words is "one million, two hundred thirty-eight thousand, seven hundred twenty".