38624399 has 8 divisors (see below), whose sum is σ = 42204240. Its totient is φ = 35056000.

The previous prime is 38624389. The next prime is 38624413. The reversal of 38624399 is 99342683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38624399 - 2¹² = 38620303 is a prime.

It is a super-2 number, since 2×38624399² = 2983688396222402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38624329) 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, 5207 + ... + 10215.

It is an arithmetic number, because the mean of its divisors is an integer number (5275530).

Almost surely, 2^38624399 is an apocalyptic number.

38624399 is a deficient number, since it is larger than the sum of its proper divisors (3579841).

38624399 is a wasteful number, since it uses less digits than its factorization.

38624399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5721.

The product of its digits is 279936, while the sum is 44.

The square root of 38624399 is about 6214.8530956089. The cubic root of 38624399 is about 338.0289618403.

The spelling of 38624399 in words is "thirty-eight million, six hundred twenty-four thousand, three hundred ninety-nine".