1238037440 has 56 divisors (see below), whose sum is σ = 2985455040. Its totient is φ = 488936448.

The previous prime is 1238037431. The next prime is 1238037487. The reversal of 1238037440 is 447308321.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1238037397 and 1238037406.

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, 794 + ... + 49766.

Almost surely, 2^1238037440 is an apocalyptic number.

1238037440 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 1238037440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492727520).

1238037440 is an abundant number, since it is smaller than the sum of its proper divisors (1747417600).

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

1238037440 is an equidigital number, since it uses as much as digits as its factorization.

1238037440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49069 (or 49059 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 1238037440 is about 35185.7562090116. The cubic root of 1238037440 is about 1073.7699838125.

The spelling of 1238037440 in words is "one billion, two hundred thirty-eight million, thirty-seven thousand, four hundred forty".