42778904 has 32 divisors (see below), whose sum is σ = 92294400. Its totient is φ = 18208800.

The previous prime is 42778891. The next prime is 42778909. The reversal of 42778904 is 40987724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42778909) 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, 5927 + ... + 10985.

It is an arithmetic number, because the mean of its divisors is an integer number (2884200).

Almost surely, 2^42778904 is an apocalyptic number.

It is an amenable number.

42778904 is an abundant number, since it is smaller than the sum of its proper divisors (49515496).

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

42778904 is a wasteful number, since it uses less digits than its factorization.

42778904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223 (or 5219 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 42778904 is about 6540.5583859484. The cubic root of 42778904 is about 349.7383186856.

The spelling of 42778904 in words is "forty-two million, seven hundred seventy-eight thousand, nine hundred four".