42838399 has 4 divisors (see below), whose sum is σ = 43883280. Its totient is φ = 41793520.

The previous prime is 42838391. The next prime is 42838403. The reversal of 42838399 is 99383824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42838399 - 2³ = 42838391 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42838391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522379 + ... + 522460.

It is an arithmetic number, because the mean of its divisors is an integer number (10970820).

Almost surely, 2^42838399 is an apocalyptic number.

42838399 is a deficient number, since it is larger than the sum of its proper divisors (1044881).

42838399 is a wasteful number, since it uses less digits than its factorization.

42838399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044880.

The product of its digits is 373248, while the sum is 46.

The square root of 42838399 is about 6545.1049647809. The cubic root of 42838399 is about 349.9003770885.

The spelling of 42838399 in words is "forty-two million, eight hundred thirty-eight thousand, three hundred ninety-nine".