72280087 has 4 divisors (see below), whose sum is σ = 78851016. Its totient is φ = 65709160.

The previous prime is 72280081. The next prime is 72280157. The reversal of 72280087 is 78008227.

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

It is not a de Polignac number, because 72280087 - 2³ = 72280079 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 (72280081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285448 + ... + 3285469.

It is an arithmetic number, because the mean of its divisors is an integer number (19712754).

Almost surely, 2^72280087 is an apocalyptic number.

72280087 is a deficient number, since it is larger than the sum of its proper divisors (6570929).

72280087 is a wasteful number, since it uses less digits than its factorization.

72280087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570928.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 72280087 is about 8501.7696393163. The cubic root of 72280087 is about 416.5555151692. Note that the first 4 decimals are identical.

The spelling of 72280087 in words is "seventy-two million, two hundred eighty thousand, eighty-seven".