42578550 has 108 divisors (see below), whose sum is σ = 133139916. Its totient is φ = 9727200.

The previous prime is 42578539. The next prime is 42578597. The reversal of 42578550 is 5587524.

It is a happy number.

42578550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 21085 + ... + 23015.

It is an arithmetic number, because the mean of its divisors is an integer number (1232777).

Almost surely, 2^42578550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42578550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66569958).

42578550 is an abundant number, since it is smaller than the sum of its proper divisors (90561366).

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

42578550 is a wasteful number, since it uses less digits than its factorization.

42578550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 42578550 is about 6525.2241340815. The cubic root of 42578550 is about 349.1914669841.

The spelling of 42578550 in words is "forty-two million, five hundred seventy-eight thousand, five hundred fifty".