72775871 has 16 divisors (see below), whose sum is σ = 88239360. Its totient is φ = 58631040.

The previous prime is 72775847. The next prime is 72775873. The reversal of 72775871 is 17857727.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72775871 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72775873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15335 + ... + 19511.

It is an arithmetic number, because the mean of its divisors is an integer number (5514960).

Almost surely, 2^72775871 is an apocalyptic number.

72775871 is a deficient number, since it is larger than the sum of its proper divisors (15463489).

72775871 is a wasteful number, since it uses less digits than its factorization.

72775871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334.

The product of its digits is 192080, while the sum is 44.

The square root of 72775871 is about 8530.8775046885. The cubic root of 72775871 is about 417.5057591805.

The spelling of 72775871 in words is "seventy-two million, seven hundred seventy-five thousand, eight hundred seventy-one".