72336287 has 4 divisors (see below), whose sum is σ = 76143480. Its totient is φ = 68529096.

The previous prime is 72336283. The next prime is 72336289. The reversal of 72336287 is 78263327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72336287 - 2² = 72336283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72336287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72336281) 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, 1903568 + ... + 1903605.

It is an arithmetic number, because the mean of its divisors is an integer number (19035870).

Almost surely, 2^72336287 is an apocalyptic number.

72336287 is a deficient number, since it is larger than the sum of its proper divisors (3807193).

72336287 is a wasteful number, since it uses less digits than its factorization.

72336287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807192.

The product of its digits is 84672, while the sum is 38.

The square root of 72336287 is about 8505.0741913284. The cubic root of 72336287 is about 416.6634487929.

The spelling of 72336287 in words is "seventy-two million, three hundred thirty-six thousand, two hundred eighty-seven".