622890391 has 4 divisors (see below), whose sum is σ = 644369400. Its totient is φ = 601411384.

The previous prime is 622890377. The next prime is 622890403. The reversal of 622890391 is 193098226.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 622890391 - 2⁹ = 622889879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622890311) by changing a digit.

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, 10739461 + ... + 10739518.

It is an arithmetic number, because the mean of its divisors is an integer number (161092350).

Almost surely, 2^622890391 is an apocalyptic number.

622890391 is a deficient number, since it is larger than the sum of its proper divisors (21479009).

622890391 is a wasteful number, since it uses less digits than its factorization.

622890391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21479008.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 622890391 is about 24957.7721561841. The cubic root of 622890391 is about 854.0249207974.

The spelling of 622890391 in words is "six hundred twenty-two million, eight hundred ninety thousand, three hundred ninety-one".