72906286 has 4 divisors (see below), whose sum is σ = 109359432. Its totient is φ = 36453142.

The previous prime is 72906277. The next prime is 72906289. The reversal of 72906286 is 68260927.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72906289) by changing a digit.

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 as a sum of consecutive naturals, namely, 18226570 + ... + 18226573.

It is an arithmetic number, because the mean of its divisors is an integer number (27339858).

Almost surely, 2^72906286 is an apocalyptic number.

72906286 is a deficient number, since it is larger than the sum of its proper divisors (36453146).

72906286 is a wasteful number, since it uses less digits than its factorization.

72906286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36453145.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 72906286 is about 8538.5177870635. The cubic root of 72906286 is about 417.7550016872.

The spelling of 72906286 in words is "seventy-two million, nine hundred six thousand, two hundred eighty-six".