38139066 has 64 divisors (see below), whose sum is σ = 97612800. Its totient is φ = 10812528.

The previous prime is 38139029. The next prime is 38139097. The reversal of 38139066 is 66093183.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 38139066.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61305 + ... + 61923.

It is an arithmetic number, because the mean of its divisors is an integer number (1525200).

Almost surely, 2^38139066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38139066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48806400).

38139066 is an abundant number, since it is smaller than the sum of its proper divisors (59473734).

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

38139066 is a wasteful number, since it uses less digits than its factorization.

38139066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 38139066 is about 6175.6834439599. The cubic root of 38139066 is about 336.6071611111.

The spelling of 38139066 in words is "thirty-eight million, one hundred thirty-nine thousand, sixty-six".