42550290 has 96 divisors (see below), whose sum is σ = 116093952. Its totient is φ = 10800000.

The previous prime is 42550289. The next prime is 42550309. The reversal of 42550290 is 9205524.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 281715 + ... + 281865.

It is an arithmetic number, because the mean of its divisors is an integer number (1209312).

Almost surely, 2^42550290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42550290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58046976).

42550290 is an abundant number, since it is smaller than the sum of its proper divisors (73543662).

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

42550290 is a wasteful number, since it uses less digits than its factorization.

42550290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 42550290 is about 6523.0583317950. The cubic root of 42550290 is about 349.1141954089.

The spelling of 42550290 in words is "forty-two million, five hundred fifty thousand, two hundred ninety".