42040278 has 96 divisors (see below), whose sum is σ = 110223360. Its totient is φ = 11327040.

The previous prime is 42040277. The next prime is 42040301. The reversal of 42040278 is 87204024.

42040278 is nontrivially palindromic in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040277) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183468 + ... + 183696.

It is an arithmetic number, because the mean of its divisors is an integer number (1148160).

Almost surely, 2^42040278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42040278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55111680).

42040278 is an abundant number, since it is smaller than the sum of its proper divisors (68183082).

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

42040278 is a wasteful number, since it uses less digits than its factorization.

42040278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 42040278 is about 6483.8474689030. The cubic root of 42040278 is about 347.7137459722.

The spelling of 42040278 in words is "forty-two million, forty thousand, two hundred seventy-eight".