42578811 has 24 divisors (see below), whose sum is σ = 69340880. Its totient is φ = 25803360.

The previous prime is 42578803. The next prime is 42578827. The reversal of 42578811 is 11887524.

42578811 is a `hidden beast` number, since 4 + 2 + 578 + 81 + 1 = 666.

It is not a de Polignac number, because 42578811 - 2³ = 42578803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42578801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3250 + ... + 9783.

Almost surely, 2^42578811 is an apocalyptic number.

42578811 is a deficient number, since it is larger than the sum of its proper divisors (26762069).

42578811 is a wasteful number, since it uses less digits than its factorization.

42578811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13064 (or 13047 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 42578811 is about 6525.2441333639. The cubic root of 42578811 is about 349.1921804794.

The spelling of 42578811 in words is "forty-two million, five hundred seventy-eight thousand, eight hundred eleven".