42878288 has 40 divisors (see below), whose sum is σ = 89339520. Its totient is φ = 19872000.

The previous prime is 42878287. The next prime is 42878293. The reversal of 42878288 is 88287824.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878287) 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, 12788 + ... + 15788.

It is an arithmetic number, because the mean of its divisors is an integer number (2233488).

Almost surely, 2^42878288 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 42878288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44669760).

42878288 is an abundant number, since it is smaller than the sum of its proper divisors (46461232).

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

42878288 is a wasteful number, since it uses less digits than its factorization.

42878288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075 (or 3069 counting only the distinct ones).

The product of its digits is 458752, while the sum is 47.

The square root of 42878288 is about 6548.1514948877. The cubic root of 42878288 is about 350.0089467101.

The spelling of 42878288 in words is "forty-two million, eight hundred seventy-eight thousand, two hundred eighty-eight".