72824306 has 4 divisors (see below), whose sum is σ = 109236462. Its totient is φ = 36412152.

The previous prime is 72824287. The next prime is 72824309. The reversal of 72824306 is 60342827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60342827 = 97 ⋅622091.

It can be written as a sum of positive squares in only one way, i.e., 62552281 + 10272025 = 7909^2 + 3205^2 .

It is not an unprimeable number, because it can be changed into a prime (72824309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18206075 + ... + 18206078.

Almost surely, 2^72824306 is an apocalyptic number.

72824306 is a deficient number, since it is larger than the sum of its proper divisors (36412156).

72824306 is a wasteful number, since it uses less digits than its factorization.

72824306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36412155.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 72824306 is about 8533.7158377813. The cubic root of 72824306 is about 417.5983604172.

The spelling of 72824306 in words is "seventy-two million, eight hundred twenty-four thousand, three hundred six".