38909634 has 16 divisors (see below), whose sum is σ = 82397088. Its totient is φ = 12206912.

The previous prime is 38909627. The next prime is 38909639. The reversal of 38909634 is 43690983.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (38909639) 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, 190632 + ... + 190835.

It is an arithmetic number, because the mean of its divisors is an integer number (5149818).

Almost surely, 2^38909634 is an apocalyptic number.

38909634 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

38909634 is an abundant number, since it is smaller than the sum of its proper divisors (43487454).

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

38909634 is a wasteful number, since it uses less digits than its factorization.

38909634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381489.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 38909634 is about 6237.7587321088. The cubic root of 38909634 is about 338.8590184826.

The spelling of 38909634 in words is "thirty-eight million, nine hundred nine thousand, six hundred thirty-four".