72228776 has 16 divisors (see below), whose sum is σ = 135524340. Its totient is φ = 36088960.

The previous prime is 72228769. The next prime is 72228787. The reversal of 72228776 is 67782227.

It can be written as a sum of positive squares in 2 ways, for example, as 55204900 + 17023876 = 7430^2 + 4126^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15020 + ... + 19236.

Almost surely, 2^72228776 is an apocalyptic number.

It is an amenable number.

72228776 is a deficient number, since it is larger than the sum of its proper divisors (63295564).

72228776 is a wasteful number, since it uses less digits than its factorization.

72228776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6364 (or 6360 counting only the distinct ones).

The product of its digits is 131712, while the sum is 41.

The square root of 72228776 is about 8498.7514377113. The cubic root of 72228776 is about 416.4569221328.

The spelling of 72228776 in words is "seventy-two million, two hundred twenty-eight thousand, seven hundred seventy-six".