622021008 has 40 divisors (see below), whose sum is σ = 1836443968. Its totient is φ = 177720192.

The previous prime is 622020961. The next prime is 622021009. The reversal of 622021008 is 800120226.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (622021009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925291 + ... + 925962.

Almost surely, 2^622021008 is an apocalyptic number.

It is an amenable number.

622021008 is an abundant number, since it is smaller than the sum of its proper divisors (1214422960).

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

622021008 is a wasteful number, since it uses less digits than its factorization.

622021008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851271 (or 1851265 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 622021008 is about 24940.3489951524. The cubic root of 622021008 is about 853.6274081390.

The spelling of 622021008 in words is "six hundred twenty-two million, twenty-one thousand, eight".