42099798 has 64 divisors (see below), whose sum is σ = 97800192. Its totient is φ = 11975040.

The previous prime is 42099797. The next prime is 42099809. The reversal of 42099798 is 89799024.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42099791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55236 + ... + 55992.

It is an arithmetic number, because the mean of its divisors is an integer number (1528128).

Almost surely, 2^42099798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42099798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48900096).

42099798 is an abundant number, since it is smaller than the sum of its proper divisors (55700394).

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

42099798 is a wasteful number, since it uses less digits than its factorization.

42099798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 42099798 is about 6488.4357128664. The cubic root of 42099798 is about 347.8777645740.

The spelling of 42099798 in words is "forty-two million, ninety-nine thousand, seven hundred ninety-eight".