72365478 has 8 divisors (see below), whose sum is σ = 144730968. Its totient is φ = 24121824.

The previous prime is 72365467. The next prime is 72365483. The reversal of 72365478 is 87456327.

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

72365478 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6030451 + ... + 6030462.

It is an arithmetic number, because the mean of its divisors is an integer number (18091371).

Almost surely, 2^72365478 is an apocalyptic number.

72365478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72365478 is a wasteful number, since it uses less digits than its factorization.

72365478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12060918.

The product of its digits is 282240, while the sum is 42.

The square root of 72365478 is about 8506.7901114345. The cubic root of 72365478 is about 416.7194888411.

The spelling of 72365478 in words is "seventy-two million, three hundred sixty-five thousand, four hundred seventy-eight".