72870718 has 4 divisors (see below), whose sum is σ = 109306080. Its totient is φ = 36435358.

The previous prime is 72870713. The next prime is 72870761. The reversal of 72870718 is 81707827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81707827 = 2239 ⋅36493.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72870713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18217678 + ... + 18217681.

It is an arithmetic number, because the mean of its divisors is an integer number (27326520).

Almost surely, 2^72870718 is an apocalyptic number.

72870718 is a deficient number, since it is larger than the sum of its proper divisors (36435362).

72870718 is a wasteful number, since it uses less digits than its factorization.

72870718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36435361.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 72870718 is about 8536.4347358836. The cubic root of 72870718 is about 417.6870554342.

The spelling of 72870718 in words is "seventy-two million, eight hundred seventy thousand, seven hundred eighteen".