42240128 has 32 divisors (see below), whose sum is σ = 96173760. Its totient is φ = 18102528.

The previous prime is 42240109. The next prime is 42240131. The reversal of 42240128 is 82104224.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22676 + ... + 24467.

It is an arithmetic number, because the mean of its divisors is an integer number (3005430).

Almost surely, 2^42240128 is an apocalyptic number.

It is an amenable number.

42240128 is an abundant number, since it is smaller than the sum of its proper divisors (53933632).

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

42240128 is an equidigital number, since it uses as much as digits as its factorization.

42240128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47164 (or 47152 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 42240128 is about 6499.2405710206. The cubic root of 42240128 is about 348.2638594279.

The spelling of 42240128 in words is "forty-two million, two hundred forty thousand, one hundred twenty-eight".