38013840 has 80 divisors (see below), whose sum is σ = 130944000. Its totient is φ = 10136448.

The previous prime is 38013839. The next prime is 38013863. The reversal of 38013840 is 4831083.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6640 + ... + 10959.

It is an arithmetic number, because the mean of its divisors is an integer number (1636800).

Almost surely, 2^38013840 is an apocalyptic number.

38013840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38013840 is an abundant number, since it is smaller than the sum of its proper divisors (92930160).

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

38013840 is a wasteful number, since it uses less digits than its factorization.

38013840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17621 (or 17609 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 38013840 is about 6165.5364730087. The cubic root of 38013840 is about 336.2383512868.

The spelling of 38013840 in words is "thirty-eight million, thirteen thousand, eight hundred forty".