72320078 has 8 divisors (see below), whose sum is σ = 109966368. Its totient is φ = 35664624.

The previous prime is 72320047. The next prime is 72320107. The reversal of 72320078 is 87002327.

It is a sphenic number, since it is the product of 3 distinct 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 72320078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247526 + ... + 247817.

It is an arithmetic number, because the mean of its divisors is an integer number (13745796).

Almost surely, 2^72320078 is an apocalyptic number.

72320078 is a deficient number, since it is larger than the sum of its proper divisors (37646290).

72320078 is a wasteful number, since it uses less digits than its factorization.

72320078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495418.

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

The square root of 72320078 is about 8504.1212362007. The cubic root of 72320078 is about 416.6323247074.

The spelling of 72320078 in words is "seventy-two million, three hundred twenty thousand, seventy-eight".