622405728 has 96 divisors (see below), whose sum is σ = 2074705920. Its totient is φ = 177828480.

The previous prime is 622405723. The next prime is 622405757. The reversal of 622405728 is 827504226.

622405728 is a `hidden beast` number, since 62 + 24 + 0 + 572 + 8 = 666.

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

It is a super-3 number, since 3×622405728³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 622405692 and 622405701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622405723) 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, 45408 + ... + 57503.

It is an arithmetic number, because the mean of its divisors is an integer number (21611520).

Almost surely, 2^622405728 is an apocalyptic number.

It is an amenable number.

622405728 is an abundant number, since it is smaller than the sum of its proper divisors (1452300192).

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

622405728 is a wasteful number, since it uses less digits than its factorization.

622405728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102937 (or 102923 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 622405728 is about 24948.0606059870. The cubic root of 622405728 is about 853.8033613886.

The spelling of 622405728 in words is "six hundred twenty-two million, four hundred five thousand, seven hundred twenty-eight".