72428223 has 32 divisors (see below), whose sum is σ = 114624000. Its totient is φ = 40651968.

The previous prime is 72428221. The next prime is 72428243. The reversal of 72428223 is 32282427.

It is not a de Polignac number, because 72428223 - 2¹ = 72428221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72428221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60115 + ... + 61307.

It is an arithmetic number, because the mean of its divisors is an integer number (3582000).

Almost surely, 2^72428223 is an apocalyptic number.

72428223 is a deficient number, since it is larger than the sum of its proper divisors (42195777).

72428223 is a wasteful number, since it uses less digits than its factorization.

72428223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 1262 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 72428223 is about 8510.4772486624. The cubic root of 72428223 is about 416.8398939094.

The spelling of 72428223 in words is "seventy-two million, four hundred twenty-eight thousand, two hundred twenty-three".