42090806 has 8 divisors (see below), whose sum is σ = 63198480. Its totient is φ = 21024648.

The previous prime is 42090787. The next prime is 42090821. The reversal of 42090806 is 60809024.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7706 + ... + 11981.

It is an arithmetic number, because the mean of its divisors is an integer number (7899810).

Almost surely, 2^42090806 is an apocalyptic number.

42090806 is a deficient number, since it is larger than the sum of its proper divisors (21107674).

42090806 is a wasteful number, since it uses less digits than its factorization.

42090806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20758.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 42090806 is about 6487.7427507570. The cubic root of 42090806 is about 347.8529953372.

The spelling of 42090806 in words is "forty-two million, ninety thousand, eight hundred six".