622723842 has 64 divisors (see below), whose sum is σ = 1493856000. Its totient is φ = 191147904.

The previous prime is 622723837. The next prime is 622723847. The reversal of 622723842 is 248327226.

It is a happy number.

622723842 is a `hidden beast` number, since 6 + 2 + 272 + 384 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (622723837) and next prime (622723847).

It is a junction number, because it is equal to n+sod(n) for n = 622723797 and 622723806.

It is not an unprimeable number, because it can be changed into a prime (622723847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398659 + ... + 400217.

It is an arithmetic number, because the mean of its divisors is an integer number (23341500).

Almost surely, 2^622723842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 622723842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (746928000).

622723842 is an abundant number, since it is smaller than the sum of its proper divisors (871132158).

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

622723842 is a wasteful number, since it uses less digits than its factorization.

622723842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2146 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 622723842 is about 24954.4353171936. The cubic root of 622723842 is about 853.9487973587.

The spelling of 622723842 in words is "six hundred twenty-two million, seven hundred twenty-three thousand, eight hundred forty-two".