72388423 has 4 divisors (see below), whose sum is σ = 76198360. Its totient is φ = 68578488.

The previous prime is 72388409. The next prime is 72388487. The reversal of 72388423 is 32488327.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32488327 = 47 ⋅691241.

It is a cyclic number.

It is not a de Polignac number, because 72388423 - 2⁹ = 72387911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72388123) 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, 1904940 + ... + 1904977.

It is an arithmetic number, because the mean of its divisors is an integer number (19049590).

Almost surely, 2^72388423 is an apocalyptic number.

72388423 is a deficient number, since it is larger than the sum of its proper divisors (3809937).

72388423 is a wasteful number, since it uses less digits than its factorization.

72388423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3809936.

The product of its digits is 64512, while the sum is 37.

The square root of 72388423 is about 8508.1386330971. The cubic root of 72388423 is about 416.7635274192.

The spelling of 72388423 in words is "seventy-two million, three hundred eighty-eight thousand, four hundred twenty-three".