42778093 has 8 divisors (see below), whose sum is σ = 43525440. Its totient is φ = 42034080.

The previous prime is 42778061. The next prime is 42778097. The reversal of 42778093 is 39087724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42778093 - 2⁵ = 42778061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42778097) 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, 50568 + ... + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (5440680).

Almost surely, 2^42778093 is an apocalyptic number.

It is an amenable number.

42778093 is a deficient number, since it is larger than the sum of its proper divisors (747347).

42778093 is an equidigital number, since it uses as much as digits as its factorization.

42778093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 42778093 is about 6540.4963878898. The cubic root of 42778093 is about 349.7361085653.

The spelling of 42778093 in words is "forty-two million, seven hundred seventy-eight thousand, ninety-three".