42578020 has 24 divisors (see below), whose sum is σ = 90123264. Its totient is φ = 16896096.

The previous prime is 42578017. The next prime is 42578021. The reversal of 42578020 is 2087524.

It is a self number, because there is not a number n which added to its sum of digits gives 42578020.

It is not an unprimeable number, because it can be changed into a prime (42578021) 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, 5842 + ... + 10921.

It is an arithmetic number, because the mean of its divisors is an integer number (3755136).

Almost surely, 2^42578020 is an apocalyptic number.

It is an amenable number.

42578020 is an abundant number, since it is smaller than the sum of its proper divisors (47545244).

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

42578020 is a wasteful number, since it uses less digits than its factorization.

42578020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 42578020 is about 6525.1835223233. The cubic root of 42578020 is about 349.1900181149.

The spelling of 42578020 in words is "forty-two million, five hundred seventy-eight thousand, twenty".