72947306 has 16 divisors (see below), whose sum is σ = 120896064. Its totient is φ = 32835264.

The previous prime is 72947291. The next prime is 72947311. The reversal of 72947306 is 60374927.

It is a self number, because there is not a number n which added to its sum of digits gives 72947306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45860 + ... + 47423.

It is an arithmetic number, because the mean of its divisors is an integer number (7556004).

Almost surely, 2^72947306 is an apocalyptic number.

72947306 is a deficient number, since it is larger than the sum of its proper divisors (47948758).

72947306 is a wasteful number, since it uses less digits than its factorization.

72947306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93325.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 72947306 is about 8540.9195055333. The cubic root of 72947306 is about 417.8333355697.

The spelling of 72947306 in words is "seventy-two million, nine hundred forty-seven thousand, three hundred six".