622278891 has 24 divisors (see below), whose sum is σ = 968844240. Its totient is φ = 382602816.

The previous prime is 622278887. The next prime is 622278893. The reversal of 622278891 is 198872226.

It is not a de Polignac number, because 622278891 - 2² = 622278887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (622278893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221725 + ... + 224513.

It is an arithmetic number, because the mean of its divisors is an integer number (40368510).

Almost surely, 2^622278891 is an apocalyptic number.

622278891 is a deficient number, since it is larger than the sum of its proper divisors (346565349).

622278891 is a wasteful number, since it uses less digits than its factorization.

622278891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715 (or 4712 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 622278891 is about 24945.5184552256. The cubic root of 622278891 is about 853.7453599868.

The spelling of 622278891 in words is "six hundred twenty-two million, two hundred seventy-eight thousand, eight hundred ninety-one".