42549330 has 32 divisors (see below), whose sum is σ = 103796928. Its totient is φ = 11160000.

The previous prime is 42549319. The next prime is 42549337. The reversal of 42549330 is 3394524.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (42549337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9796 + ... + 13455.

It is an arithmetic number, because the mean of its divisors is an integer number (3243654).

Almost surely, 2^42549330 is an apocalyptic number.

42549330 is an abundant number, since it is smaller than the sum of its proper divisors (61247598).

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

42549330 is a wasteful number, since it uses less digits than its factorization.

42549330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 42549330 is about 6522.9847462646. The cubic root of 42549330 is about 349.1115698714. Note that the first 3 decimals are identical.

The spelling of 42549330 in words is "forty-two million, five hundred forty-nine thousand, three hundred thirty".