42820586 has 8 divisors (see below), whose sum is σ = 68009220. Its totient is φ = 20150848.

The previous prime is 42820573. The next prime is 42820627. The reversal of 42820586 is 68502824.

It can be written as a sum of positive squares in 2 ways, for example, as 40513225 + 2307361 = 6365^2 + 1519^2 .

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

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, 629681 + ... + 629748.

Almost surely, 2^42820586 is an apocalyptic number.

42820586 is a deficient number, since it is larger than the sum of its proper divisors (25188634).

42820586 is a wasteful number, since it uses less digits than its factorization.

42820586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259448.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 42820586 is about 6543.7440353363. The cubic root of 42820586 is about 349.8518720116.

The spelling of 42820586 in words is "forty-two million, eight hundred twenty thousand, five hundred eighty-six".