72305878 has 8 divisors (see below), whose sum is σ = 111104280. Its totient is φ = 35271120.

The previous prime is 72305873. The next prime is 72305899. The reversal of 72305878 is 87850327.

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 72305878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72305873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440808 + ... + 440971.

It is an arithmetic number, because the mean of its divisors is an integer number (13888035).

Almost surely, 2^72305878 is an apocalyptic number.

72305878 is a deficient number, since it is larger than the sum of its proper divisors (38798402).

72305878 is a wasteful number, since it uses less digits than its factorization.

72305878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881822.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 72305878 is about 8503.2863058937. The cubic root of 72305878 is about 416.6050544277.

The spelling of 72305878 in words is "seventy-two million, three hundred five thousand, eight hundred seventy-eight".