38718840 has 64 divisors (see below), whose sum is σ = 116645760. Its totient is φ = 10281600.

The previous prime is 38718839. The next prime is 38718847. The reversal of 38718840 is 4881783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38718847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36315 + ... + 37365.

It is an arithmetic number, because the mean of its divisors is an integer number (1822590).

Almost surely, 2^38718840 is an apocalyptic number.

38718840 is a gapful number since it is divisible by the number (30) 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 38718840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58322880).

38718840 is an abundant number, since it is smaller than the sum of its proper divisors (77926920).

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

38718840 is a wasteful number, since it uses less digits than its factorization.

38718840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 38718840 is about 6222.4464642133. The cubic root of 38718840 is about 338.3042438745.

The spelling of 38718840 in words is "thirty-eight million, seven hundred eighteen thousand, eight hundred forty".