72509378 has 8 divisors (see below), whose sum is σ = 108873660. Its totient is φ = 36218160.

The previous prime is 72509323. The next prime is 72509383. The reversal of 72509378 is 87390527.

It can be written as a sum of positive squares in 2 ways, for example, as 69939769 + 2569609 = 8363^2 + 1603^2 .

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

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, 15713 + ... + 19796.

Almost surely, 2^72509378 is an apocalyptic number.

72509378 is a deficient number, since it is larger than the sum of its proper divisors (36364282).

72509378 is a wasteful number, since it uses less digits than its factorization.

72509378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36532.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 72509378 is about 8515.2438602779. The cubic root of 72509378 is about 416.9955239165.

The spelling of 72509378 in words is "seventy-two million, five hundred nine thousand, three hundred seventy-eight".