72378015 has 8 divisors (see below), whose sum is σ = 115804848. Its totient is φ = 38601600.

The previous prime is 72377999. The next prime is 72378017. The reversal of 72378015 is 51087327.

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

It is not a de Polignac number, because 72378015 - 2⁴ = 72377999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72378017) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2412586 + ... + 2412615.

It is an arithmetic number, because the mean of its divisors is an integer number (14475606).

Almost surely, 2^72378015 is an apocalyptic number.

72378015 is a deficient number, since it is larger than the sum of its proper divisors (43426833).

72378015 is a wasteful number, since it uses less digits than its factorization.

72378015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825209.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 72378015 is about 8507.5269614618. The cubic root of 72378015 is about 416.7435523895.

The spelling of 72378015 in words is "seventy-two million, three hundred seventy-eight thousand, fifteen".