72445423 has 8 divisors (see below), whose sum is σ = 79574400. Its totient is φ = 65648088.

The previous prime is 72445409. The next prime is 72445427. The reversal of 72445423 is 32454427.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72445423 - 2⁵ = 72445391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72445427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82453 + ... + 83326.

It is an arithmetic number, because the mean of its divisors is an integer number (9946800).

Almost surely, 2^72445423 is an apocalyptic number.

72445423 is a deficient number, since it is larger than the sum of its proper divisors (7128977).

72445423 is a wasteful number, since it uses less digits than its factorization.

72445423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165821.

The product of its digits is 26880, while the sum is 31.

The square root of 72445423 is about 8511.4877077982. The cubic root of 72445423 is about 416.8728878557.

The spelling of 72445423 in words is "seventy-two million, four hundred forty-five thousand, four hundred twenty-three".