72776522 has 16 divisors (see below), whose sum is σ = 134356992. Its totient is φ = 28790640.

The previous prime is 72776513. The next prime is 72776527. The reversal of 72776522 is 22567727.

It is not an unprimeable number, because it can be changed into a prime (72776527) 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, 199754 + ... + 200117.

It is an arithmetic number, because the mean of its divisors is an integer number (8397312).

Almost surely, 2^72776522 is an apocalyptic number.

72776522 is a deficient number, since it is larger than the sum of its proper divisors (61580470).

72776522 is a wasteful number, since it uses less digits than its factorization.

72776522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399893.

The product of its digits is 82320, while the sum is 38.

The square root of 72776522 is about 8530.9156601153. The cubic root of 72776522 is about 417.5070040777.

The spelling of 72776522 in words is "seventy-two million, seven hundred seventy-six thousand, five hundred twenty-two".