622944864 has 96 divisors (see below), whose sum is σ = 1835900640. Its totient is φ = 205479936.

The previous prime is 622944851. The next prime is 622944869. The reversal of 622944864 is 468449226.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622944869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80092 + ... + 87524.

It is an arithmetic number, because the mean of its divisors is an integer number (19123965).

Almost surely, 2^622944864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622944864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917950320).

622944864 is an abundant number, since it is smaller than the sum of its proper divisors (1212955776).

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

622944864 is a wasteful number, since it uses less digits than its factorization.

622944864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7549 (or 7535 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 622944864 is about 24958.8634356615. The cubic root of 622944864 is about 854.0498154627.

The spelling of 622944864 in words is "six hundred twenty-two million, nine hundred forty-four thousand, eight hundred sixty-four".