38824991 has 16 divisors (see below), whose sum is σ = 42946848. Its totient is φ = 34944000.

The previous prime is 38824967. The next prime is 38825021. The reversal of 38824991 is 19942883.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 38824991 - 2¹⁸ = 38562847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38829991) 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, 36416 + ... + 37466.

It is an arithmetic number, because the mean of its divisors is an integer number (2684178).

Almost surely, 2^38824991 is an apocalyptic number.

38824991 is a deficient number, since it is larger than the sum of its proper divisors (4121857).

38824991 is a wasteful number, since it uses less digits than its factorization.

38824991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its digits is 124416, while the sum is 44.

The square root of 38824991 is about 6230.9703096709. The cubic root of 38824991 is about 338.6131250780.

The spelling of 38824991 in words is "thirty-eight million, eight hundred twenty-four thousand, nine hundred ninety-one".