38878218 has 80 divisors (see below), whose sum is σ = 97225920. Its totient is φ = 11539584.

The previous prime is 38878207. The next prime is 38878219. The reversal of 38878218 is 81287883.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (38878219) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 51955 + ... + 52697.

It is an arithmetic number, because the mean of its divisors is an integer number (1215324).

Almost surely, 2^38878218 is an apocalyptic number.

38878218 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38878218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48612960).

38878218 is an abundant number, since it is smaller than the sum of its proper divisors (58347702).

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

38878218 is a wasteful number, since it uses less digits than its factorization.

38878218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 784 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 38878218 is about 6235.2400114190. The cubic root of 38878218 is about 338.7677946199.

It can be divided in two parts, 388 and 78218, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 38878218 in words is "thirty-eight million, eight hundred seventy-eight thousand, two hundred eighteen".