42390798 has 16 divisors (see below), whose sum is σ = 85352400. Its totient is φ = 14035136.

The previous prime is 42390797. The next prime is 42390827. The reversal of 42390798 is 89709324.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42390797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22815 + ... + 24602.

It is an arithmetic number, because the mean of its divisors is an integer number (5334525).

Almost surely, 2^42390798 is an apocalyptic number.

42390798 is an abundant number, since it is smaller than the sum of its proper divisors (42961602).

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

42390798 is a wasteful number, since it uses less digits than its factorization.

42390798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47571.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 42390798 is about 6510.8216071399. The cubic root of 42390798 is about 348.6774523110.

The spelling of 42390798 in words is "forty-two million, three hundred ninety thousand, seven hundred ninety-eight".