72230078 has 4 divisors (see below), whose sum is σ = 108345120. Its totient is φ = 36115038.

The previous prime is 72230047. The next prime is 72230113. The reversal of 72230078 is 87003227.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72230078.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 18057518 + ... + 18057521.

It is an arithmetic number, because the mean of its divisors is an integer number (27086280).

Almost surely, 2^72230078 is an apocalyptic number.

72230078 is a deficient number, since it is larger than the sum of its proper divisors (36115042).

72230078 is a wasteful number, since it uses less digits than its factorization.

72230078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36115041.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 72230078 is about 8498.8280368531. The cubic root of 72230078 is about 416.4594244765.

The spelling of 72230078 in words is "seventy-two million, two hundred thirty thousand, seventy-eight".