42232140 has 108 divisors (see below), whose sum is σ = 135010512. Its totient is φ = 10665600.

The previous prime is 42232123. The next prime is 42232147. The reversal of 42232140 is 4123224.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42232147) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 418090 + ... + 418190.

Almost surely, 2^42232140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42232140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67505256).

42232140 is an abundant number, since it is smaller than the sum of its proper divisors (92778372).

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

42232140 is a wasteful number, since it uses less digits than its factorization.

42232140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42232140 is about 6498.6260086267. The cubic root of 42232140 is about 348.2419047352.

Adding to 42232140 its reverse (4123224), we get a palindrome (46355364).

The spelling of 42232140 in words is "forty-two million, two hundred thirty-two thousand, one hundred forty".