38443840 has 56 divisors (see below), whose sum is σ = 96377760. Its totient is φ = 14565888.

The previous prime is 38443831. The next prime is 38443841. The reversal of 38443840 is 4834483.

It is a junction number, because it is equal to n+sod(n) for n = 38443796 and 38443805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38443841) 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, 2919 + ... + 9241.

Almost surely, 2^38443840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38443840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48188880).

38443840 is an abundant number, since it is smaller than the sum of its proper divisors (57933920).

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

38443840 is a wasteful number, since it uses less digits than its factorization.

38443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6359 (or 6349 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 38443840 is about 6200.3096696859. The cubic root of 38443840 is about 337.5014064871.

The spelling of 38443840 in words is "thirty-eight million, four hundred forty-three thousand, eight hundred forty".