622407128 has 32 divisors (see below), whose sum is σ = 1412186400. Its totient is φ = 251054592.

The previous prime is 622407127. The next prime is 622407131. The reversal of 622407128 is 821704226.

It is a junction number, because it is equal to n+sod(n) for n = 622407094 and 622407103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622407127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325943 + ... + 327846.

It is an arithmetic number, because the mean of its divisors is an integer number (44130825).

Almost surely, 2^622407128 is an apocalyptic number.

622407128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

622407128 is an abundant number, since it is smaller than the sum of its proper divisors (789779272).

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

622407128 is a wasteful number, since it uses less digits than its factorization.

622407128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653819 (or 653815 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 622407128 is about 24948.0886642644. The cubic root of 622407128 is about 853.8040015518.

The spelling of 622407128 in words is "six hundred twenty-two million, four hundred seven thousand, one hundred twenty-eight".