42823889 has 4 divisors (see below), whose sum is σ = 42852720. Its totient is φ = 42795060.

The previous prime is 42823883. The next prime is 42823897. The reversal of 42823889 is 98832824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42823889 - 2²⁰ = 41775313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42823883) 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, 12059 + ... + 15200.

It is an arithmetic number, because the mean of its divisors is an integer number (10713180).

Almost surely, 2^42823889 is an apocalyptic number.

It is an amenable number.

42823889 is a deficient number, since it is larger than the sum of its proper divisors (28831).

42823889 is a wasteful number, since it uses less digits than its factorization.

42823889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28830.

The product of its digits is 221184, while the sum is 44.

The square root of 42823889 is about 6543.9964089232. The cubic root of 42823889 is about 349.8608671479.

The spelling of 42823889 in words is "forty-two million, eight hundred twenty-three thousand, eight hundred eighty-nine".