72788567 has 4 divisors (see below), whose sum is σ = 72824856. Its totient is φ = 72752280.

The previous prime is 72788533. The next prime is 72788591. The reversal of 72788567 is 76588727.

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 72788567 - 2¹⁶ = 72723031 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 (72788267) 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, 14948 + ... + 19209.

It is an arithmetic number, because the mean of its divisors is an integer number (18206214).

Almost surely, 2^72788567 is an apocalyptic number.

72788567 is a deficient number, since it is larger than the sum of its proper divisors (36289).

72788567 is a wasteful number, since it uses less digits than its factorization.

72788567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36288.

The product of its digits is 1317120, while the sum is 50.

The square root of 72788567 is about 8531.6215926399. The cubic root of 72788567 is about 417.5300362054.

The spelling of 72788567 in words is "seventy-two million, seven hundred eighty-eight thousand, five hundred sixty-seven".