728621622 has 64 divisors (see below), whose sum is σ = 1644408000. Its totient is φ = 239120640.

The previous prime is 728621617. The next prime is 728621629. The reversal of 728621622 is 226126827.

728621622 is a `hidden beast` number, since 7 + 2 + 8 + 6 + 21 + 622 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728621629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1101972 + ... + 1102632.

It is an arithmetic number, because the mean of its divisors is an integer number (25693875).

Almost surely, 2^728621622 is an apocalyptic number.

728621622 is an abundant number, since it is smaller than the sum of its proper divisors (915786378).

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

728621622 is a wasteful number, since it uses less digits than its factorization.

728621622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 952 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 728621622 is about 26992.9920905408. The cubic root of 728621622 is about 899.8442619412.

The spelling of 728621622 in words is "seven hundred twenty-eight million, six hundred twenty-one thousand, six hundred twenty-two".