72776871 has 12 divisors (see below), whose sum is σ = 108513600. Its totient is φ = 46952640.

The previous prime is 72776857. The next prime is 72776903. The reversal of 72776871 is 17867727.

It is a happy number.

It is not a de Polignac number, because 72776871 - 2⁹ = 72776359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72776771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130146 + ... + 130703.

It is an arithmetic number, because the mean of its divisors is an integer number (9042800).

Almost surely, 2^72776871 is an apocalyptic number.

72776871 is a deficient number, since it is larger than the sum of its proper divisors (35736729).

72776871 is a wasteful number, since it uses less digits than its factorization.

72776871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260886 (or 260883 counting only the distinct ones).

The product of its digits is 230496, while the sum is 45.

The square root of 72776871 is about 8530.9361151048. The cubic root of 72776871 is about 417.5076714619.

The spelling of 72776871 in words is "seventy-two million, seven hundred seventy-six thousand, eight hundred seventy-one".