42881920 has 32 divisors (see below), whose sum is σ = 102516120. Its totient is φ = 17152512.

The previous prime is 42881899. The next prime is 42881921. The reversal of 42881920 is 2918824.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42881921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32862 + ... + 34141.

Almost surely, 2^42881920 is an apocalyptic number.

42881920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42881920 is an abundant number, since it is smaller than the sum of its proper divisors (59634200).

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

42881920 is an equidigital number, since it uses as much as digits as its factorization.

42881920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67022 (or 67010 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 42881920 is about 6548.4288191901. The cubic root of 42881920 is about 350.0188289190.

The spelling of 42881920 in words is "forty-two million, eight hundred eighty-one thousand, nine hundred twenty".