422028091 has 4 divisors (see below), whose sum is σ = 423223992. Its totient is φ = 420832192.

The previous prime is 422028049. The next prime is 422028143. The reversal of 422028091 is 190820224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422028091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422028041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597421 + ... + 598126.

It is an arithmetic number, because the mean of its divisors is an integer number (105805998).

Almost surely, 2^422028091 is an apocalyptic number.

422028091 is a deficient number, since it is larger than the sum of its proper divisors (1195901).

422028091 is a wasteful number, since it uses less digits than its factorization.

422028091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195900.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 422028091 is about 20543.3222970385. The cubic root of 422028091 is about 750.0907096212.

The spelling of 422028091 in words is "four hundred twenty-two million, twenty-eight thousand, ninety-one".