72578443 has 4 divisors (see below), whose sum is σ = 82946800. Its totient is φ = 62210088.

The previous prime is 72578417. The next prime is 72578447. The reversal of 72578443 is 34487527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72578443 - 2⁹ = 72577931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72578396 and 72578405.

It is not an unprimeable number, because it can be changed into a prime (72578447) 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, 5184168 + ... + 5184181.

It is an arithmetic number, because the mean of its divisors is an integer number (20736700).

Almost surely, 2^72578443 is an apocalyptic number.

72578443 is a deficient number, since it is larger than the sum of its proper divisors (10368357).

72578443 is a wasteful number, since it uses less digits than its factorization.

72578443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10368356.

The product of its digits is 188160, while the sum is 40.

The square root of 72578443 is about 8519.2982692238. The cubic root of 72578443 is about 417.1278776321.

The spelling of 72578443 in words is "seventy-two million, five hundred seventy-eight thousand, four hundred forty-three".