72612287 has 8 divisors (see below), whose sum is σ = 83873232. Its totient is φ = 62128000.

The previous prime is 72612247. The next prime is 72612307. The reversal of 72612287 is 78221627.

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

It is not a de Polignac number, because 72612287 - 2⁶ = 72612223 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 (72612217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193964 + ... + 194337.

It is an arithmetic number, because the mean of its divisors is an integer number (10484154).

Almost surely, 2^72612287 is an apocalyptic number.

72612287 is a deficient number, since it is larger than the sum of its proper divisors (11260945).

72612287 is a wasteful number, since it uses less digits than its factorization.

72612287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388329.

The product of its digits is 18816, while the sum is 35.

The square root of 72612287 is about 8521.2843515517. The cubic root of 72612287 is about 417.1927044206.

The spelling of 72612287 in words is "seventy-two million, six hundred twelve thousand, two hundred eighty-seven".