72026189 has 4 divisors (see below), whose sum is σ = 72077280. Its totient is φ = 71975100.

The previous prime is 72026183. The next prime is 72026209. The reversal of 72026189 is 98162027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98162027 = 31 ⋅3166517.

It is a cyclic number.

It is not a de Polignac number, because 72026189 - 2⁴ = 72026173 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 (72026183) 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, 23369 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (18019320).

Almost surely, 2^72026189 is an apocalyptic number.

It is an amenable number.

72026189 is a deficient number, since it is larger than the sum of its proper divisors (51091).

72026189 is a wasteful number, since it uses less digits than its factorization.

72026189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51090.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 72026189 is about 8486.8244355589. The cubic root of 72026189 is about 416.0671986027.

The spelling of 72026189 in words is "seventy-two million, twenty-six thousand, one hundred eighty-nine".