42939198 has 48 divisors (see below), whose sum is σ = 98532720. Its totient is φ = 13491072.

The previous prime is 42939187. The next prime is 42939199. The reversal of 42939198 is 89193924.

42939198 is a `hidden beast` number, since 429 + 39 + 198 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42939199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21490 + ... + 23402.

It is an arithmetic number, because the mean of its divisors is an integer number (2052765).

Almost surely, 2^42939198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42939198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49266360).

42939198 is an abundant number, since it is smaller than the sum of its proper divisors (55593522).

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

42939198 is a wasteful number, since it uses less digits than its factorization.

42939198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993 (or 1990 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 42939198 is about 6552.8007752411. The cubic root of 42939198 is about 350.1746013191.

The spelling of 42939198 in words is "forty-two million, nine hundred thirty-nine thousand, one hundred ninety-eight".