42628279 has 4 divisors (see below), whose sum is σ = 42806880. Its totient is φ = 42449680.

The previous prime is 42628273. The next prime is 42628303. The reversal of 42628279 is 97282624.

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 42628279 - 2⁵ = 42628247 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42628273) 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, 88942 + ... + 89419.

It is an arithmetic number, because the mean of its divisors is an integer number (10701720).

Almost surely, 2^42628279 is an apocalyptic number.

42628279 is a deficient number, since it is larger than the sum of its proper divisors (178601).

42628279 is a wasteful number, since it uses less digits than its factorization.

42628279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178600.

The product of its digits is 96768, while the sum is 40.

The square root of 42628279 is about 6529.0335425697. The cubic root of 42628279 is about 349.3273584636.

The spelling of 42628279 in words is "forty-two million, six hundred twenty-eight thousand, two hundred seventy-nine".