622990784 has 84 divisors (see below), whose sum is σ = 1349837280. Its totient is φ = 285143040.

The previous prime is 622990783. The next prime is 622990799. The reversal of 622990784 is 487099226.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622990783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2584904 + ... + 2585144.

Almost surely, 2^622990784 is an apocalyptic number.

622990784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622990784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674918640).

622990784 is an abundant number, since it is smaller than the sum of its proper divisors (726846496).

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

622990784 is a wasteful number, since it uses less digits than its factorization.

622990784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 622990784 is about 24959.7833323929. The cubic root of 622990784 is about 854.0708002005.

The spelling of 622990784 in words is "six hundred twenty-two million, nine hundred ninety thousand, seven hundred eighty-four".