622978686 has 48 divisors (see below), whose sum is σ = 1477867248. Its totient is φ = 188092800.

The previous prime is 622978673. The next prime is 622978687. The reversal of 622978686 is 686879226.

622978686 is a `hidden beast` number, since 622 + 9 + 7 + 8 + 6 + 8 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622978687) 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, 50040 + ... + 61236.

It is an arithmetic number, because the mean of its divisors is an integer number (30788901).

Almost surely, 2^622978686 is an apocalyptic number.

622978686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 622978686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738933624).

622978686 is an abundant number, since it is smaller than the sum of its proper divisors (854888562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

622978686 is a wasteful number, since it uses less digits than its factorization.

622978686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11497 (or 11494 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 622978686 is about 24959.5409813562. The cubic root of 622978686 is about 854.0652716996.

The spelling of 622978686 in words is "six hundred twenty-two million, nine hundred seventy-eight thousand, six hundred eighty-six".