73256389 has 4 divisors (see below), whose sum is σ = 73290400. Its totient is φ = 73222380.

The previous prime is 73256371. The next prime is 73256401. The reversal of 73256389 is 98365237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98365237 = 73 ⋅1347469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73256389 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 (73256089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13539 + ... + 18160.

It is an arithmetic number, because the mean of its divisors is an integer number (18322600).

Almost surely, 2^73256389 is an apocalyptic number.

It is an amenable number.

73256389 is a deficient number, since it is larger than the sum of its proper divisors (34011).

73256389 is a wasteful number, since it uses less digits than its factorization.

73256389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34010.

The product of its digits is 272160, while the sum is 43.

The square root of 73256389 is about 8558.9946255387. The cubic root of 73256389 is about 418.4226340507.

It can be divided in two parts, 732 and 56389, that added together give a square (57121 = 239²).

The spelling of 73256389 in words is "seventy-three million, two hundred fifty-six thousand, three hundred eighty-nine".