73421128 has 32 divisors (see below), whose sum is σ = 150516000. Its totient is φ = 33298560.

The previous prime is 73421093. The next prime is 73421141. The reversal of 73421128 is 82112437.

It is a junction number, because it is equal to n+sod(n) for n = 73421096 and 73421105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64468 + ... + 65596.

It is an arithmetic number, because the mean of its divisors is an integer number (4703625).

Almost surely, 2^73421128 is an apocalyptic number.

It is an amenable number.

73421128 is an abundant number, since it is smaller than the sum of its proper divisors (77094872).

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

73421128 is a wasteful number, since it uses less digits than its factorization.

73421128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1881 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 73421128 is about 8568.6129565992. The cubic root of 73421128 is about 418.7360489003.

It can be divided in two parts, 7342112 and 8, that multiplied together give a square (58736896 = 7664²).

The spelling of 73421128 in words is "seventy-three million, four hundred twenty-one thousand, one hundred twenty-eight".