73123456 has 32 divisors (see below), whose sum is σ = 166488480. Its totient is φ = 31338240.

The previous prime is 73123403. The next prime is 73123487. The reversal of 73123456 is 65432137.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39910 + ... + 41701.

It is an arithmetic number, because the mean of its divisors is an integer number (5202765).

Almost surely, 2^73123456 is an apocalyptic number.

It is an amenable number.

73123456 is an abundant number, since it is smaller than the sum of its proper divisors (93365024).

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

73123456 is an equidigital number, since it uses as much as digits as its factorization.

73123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81632 (or 81620 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 73123456 is about 8551.2254092615. The cubic root of 73123456 is about 418.1693871770.

The spelling of 73123456 in words is "seventy-three million, one hundred twenty-three thousand, four hundred fifty-six".