42845920 has 48 divisors (see below), whose sum is σ = 109015200. Its totient is φ = 15819264.

The previous prime is 42845879. The next prime is 42845921. The reversal of 42845920 is 2954824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42845921) 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, 8220 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (2271150).

Almost surely, 2^42845920 is an apocalyptic number.

42845920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42845920 is an abundant number, since it is smaller than the sum of its proper divisors (66169280).

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

42845920 is a wasteful number, since it uses less digits than its factorization.

42845920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20627 (or 20619 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 42845920 is about 6545.6794910842. The cubic root of 42845920 is about 349.9208528517.

The spelling of 42845920 in words is "forty-two million, eight hundred forty-five thousand, nine hundred twenty".