42138280 has 32 divisors (see below), whose sum is σ = 97020000. Its totient is φ = 16462656.

The previous prime is 42138263. The next prime is 42138289. The reversal of 42138280 is 8283124.

It is not an unprimeable number, because it can be changed into a prime (42138289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10530 + ... + 13969.

It is an arithmetic number, because the mean of its divisors is an integer number (3031875).

Almost surely, 2^42138280 is an apocalyptic number.

42138280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42138280 is an abundant number, since it is smaller than the sum of its proper divisors (54881720).

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

42138280 is a wasteful number, since it uses less digits than its factorization.

42138280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24553 (or 24549 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 42138280 is about 6491.4004652309. The cubic root of 42138280 is about 347.9837267240.

The spelling of 42138280 in words is "forty-two million, one hundred thirty-eight thousand, two hundred eighty".