42023889 has 6 divisors (see below), whose sum is σ = 60701186. Its totient is φ = 28015920.

The previous prime is 42023873. The next prime is 42023903. The reversal of 42023889 is 98832024.

It can be written as a sum of positive squares in only one way, i.e., 41990400 + 33489 = 6480^2 + 183^2 .

It is not a de Polignac number, because 42023889 - 2⁴ = 42023873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42023809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2334652 + ... + 2334669.

Almost surely, 2^42023889 is an apocalyptic number.

It is an amenable number.

42023889 is a deficient number, since it is larger than the sum of its proper divisors (18677297).

42023889 is a wasteful number, since it uses less digits than its factorization.

42023889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669327 (or 4669324 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 42023889 is about 6482.5835127671. The cubic root of 42023889 is about 347.6685558075.

The spelling of 42023889 in words is "forty-two million, twenty-three thousand, eight hundred eighty-nine".