73428839221 has 8 divisors (see below), whose sum is σ = 76729484160. Its totient is φ = 70137201552.

The previous prime is 73428839137. The next prime is 73428839233. The reversal of 73428839221 is 12293882437.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73428839221 - 2⁷ = 73428839093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73428839261) 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 7 ways as a sum of consecutive naturals, for example, 2235145 + ... + 2267758.

It is an arithmetic number, because the mean of its divisors is an integer number (9591185520).

Almost surely, 2^73428839221 is an apocalyptic number.

It is an amenable number.

73428839221 is a deficient number, since it is larger than the sum of its proper divisors (3300644939).

73428839221 is a wasteful number, since it uses less digits than its factorization.

73428839221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503635.

The product of its digits is 1161216, while the sum is 49.

The spelling of 73428839221 in words is "seventy-three billion, four hundred twenty-eight million, eight hundred thirty-nine thousand, two hundred twenty-one".