42149808 has 120 divisors (see below), whose sum is σ = 126064848. Its totient is φ = 13623552.

The previous prime is 42149803. The next prime is 42149819. The reversal of 42149808 is 80894124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (42149803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143710 + ... + 144002.

Almost surely, 2^42149808 is an apocalyptic number.

42149808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42149808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63032424).

42149808 is an abundant number, since it is smaller than the sum of its proper divisors (83915040).

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

42149808 is a wasteful number, since it uses less digits than its factorization.

42149808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 42149808 is about 6492.2883484947. The cubic root of 42149808 is about 348.0154571018.

The spelling of 42149808 in words is "forty-two million, one hundred forty-nine thousand, eight hundred eight".