38389830 has 16 divisors (see below), whose sum is σ = 92135664. Its totient is φ = 10237280.

The previous prime is 38389807. The next prime is 38389837. The reversal of 38389830 is 3898383.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38389837) 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, 639801 + ... + 639860.

It is an arithmetic number, because the mean of its divisors is an integer number (5758479).

Almost surely, 2^38389830 is an apocalyptic number.

38389830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38389830 is an abundant number, since it is smaller than the sum of its proper divisors (53745834).

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

38389830 is a wasteful number, since it uses less digits than its factorization.

38389830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279671.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 38389830 is about 6195.9527112463. The cubic root of 38389830 is about 337.3432797750.

The spelling of 38389830 in words is "thirty-eight million, three hundred eighty-nine thousand, eight hundred thirty".