42817890 has 32 divisors (see below), whose sum is σ = 103069440. Its totient is φ = 11384064.

The previous prime is 42817823. The next prime is 42817897. The reversal of 42817890 is 9871824.

It is not an unprimeable number, because it can be changed into a prime (42817897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9066 + ... + 12954.

It is an arithmetic number, because the mean of its divisors is an integer number (3220920).

Almost surely, 2^42817890 is an apocalyptic number.

42817890 is an abundant number, since it is smaller than the sum of its proper divisors (60251550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42817890 is a wasteful number, since it uses less digits than its factorization.

42817890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 42817890 is about 6543.5380338163. The cubic root of 42817890 is about 349.8445295895.

The spelling of 42817890 in words is "forty-two million, eight hundred seventeen thousand, eight hundred ninety".