42919998 has 32 divisors (see below), whose sum is σ = 94079232. Its totient is φ = 12945600.

The previous prime is 42919973. The next prime is 42920021. The reversal of 42919998 is 89991924.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42919998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13983 + ... + 16773.

It is an arithmetic number, because the mean of its divisors is an integer number (2939976).

Almost surely, 2^42919998 is an apocalyptic number.

42919998 is an abundant number, since it is smaller than the sum of its proper divisors (51159234).

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

42919998 is a wasteful number, since it uses less digits than its factorization.

42919998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040.

The product of its digits is 419904, while the sum is 51.

The square root of 42919998 is about 6551.3355890231. The cubic root of 42919998 is about 350.1224007269.

The spelling of 42919998 in words is "forty-two million, nine hundred nineteen thousand, nine hundred ninety-eight".