422220787 has 4 divisors (see below), whose sum is σ = 431204256. Its totient is φ = 413237320.

The previous prime is 422220769. The next prime is 422220803. The reversal of 422220787 is 787022224.

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-422220787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422220287) 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, 4491664 + ... + 4491757.

It is an arithmetic number, because the mean of its divisors is an integer number (107801064).

Almost surely, 2^422220787 is an apocalyptic number.

422220787 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

422220787 is a deficient number, since it is larger than the sum of its proper divisors (8983469).

422220787 is an equidigital number, since it uses as much as digits as its factorization.

422220787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8983468.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 422220787 is about 20548.0117529653. The cubic root of 422220787 is about 750.2048548557.

The spelling of 422220787 in words is "four hundred twenty-two million, two hundred twenty thousand, seven hundred eighty-seven".