42278392 has 24 divisors (see below), whose sum is σ = 85841640. Its totient is φ = 19512480.

The previous prime is 42278359. The next prime is 42278399. The reversal of 42278392 is 29387224.

42278392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42278399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14284 + ... + 16987.

It is an arithmetic number, because the mean of its divisors is an integer number (3576735).

Almost surely, 2^42278392 is an apocalyptic number.

It is an amenable number.

42278392 is an abundant number, since it is smaller than the sum of its proper divisors (43563248).

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

42278392 is a wasteful number, since it uses less digits than its factorization.

42278392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31303 (or 31286 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 42278392 is about 6502.1836332112. The cubic root of 42278392 is about 348.3689881062.

The spelling of 42278392 in words is "forty-two million, two hundred seventy-eight thousand, three hundred ninety-two".