420866090 has 8 divisors (see below), whose sum is σ = 757558980. Its totient is φ = 168346432.

The previous prime is 420866071. The next prime is 420866123. The reversal of 420866090 is 90668024.

It can be written as a sum of positive squares in 2 ways, for example, as 420619081 + 247009 = 20509^2 + 497^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 420866090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21043295 + ... + 21043314.

Almost surely, 2^420866090 is an apocalyptic number.

420866090 is a deficient number, since it is larger than the sum of its proper divisors (336692890).

420866090 is a wasteful number, since it uses less digits than its factorization.

420866090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42086616.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 420866090 is about 20515.0210821242. The cubic root of 420866090 is about 749.4016501710.

The spelling of 420866090 in words is "four hundred twenty million, eight hundred sixty-six thousand, ninety".