42885890 has 8 divisors (see below), whose sum is σ = 77194620. Its totient is φ = 17154352.

The previous prime is 42885889. The next prime is 42885901. The reversal of 42885890 is 9858824.

It can be written as a sum of positive squares in 2 ways, for example, as 38353249 + 4532641 = 6193^2 + 2129^2 .

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

It is a super-2 number, since 2×42885890² = 3678399122184200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144285 + ... + 2144304.

Almost surely, 2^42885890 is an apocalyptic number.

42885890 is a deficient number, since it is larger than the sum of its proper divisors (34308730).

42885890 is a wasteful number, since it uses less digits than its factorization.

42885890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288596.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 42885890 is about 6548.7319383221. The cubic root of 42885890 is about 350.0296301446.

The spelling of 42885890 in words is "forty-two million, eight hundred eighty-five thousand, eight hundred ninety".