622774128 has 120 divisors (see below), whose sum is σ = 1737638784. Its totient is φ = 191832960.

The previous prime is 622774127. The next prime is 622774129. The reversal of 622774128 is 821477226.

622774128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (622774127) and next prime (622774129).

It is a super-2 number, since 2×622774128² = 775695229012320768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622774123) 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, 1060651 + ... + 1061237.

Almost surely, 2^622774128 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 622774128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868819392).

622774128 is an abundant number, since it is smaller than the sum of its proper divisors (1114864656).

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

622774128 is a wasteful number, since it uses less digits than its factorization.

622774128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683 (or 646 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 622774128 is about 24955.4428532134. The cubic root of 622774128 is about 853.9717826750.

It can be divided in two parts, 62 and 2774128, that added together give a triangular number (2774190 = T₂₃₅₅).

The spelling of 622774128 in words is "six hundred twenty-two million, seven hundred seventy-four thousand, one hundred twenty-eight".