7442478189 has 6 divisors (see below), whose sum is σ = 10750246286. Its totient is φ = 4961652120.

The previous prime is 7442478181. The next prime is 7442478193. The reversal of 7442478189 is 9818742447.

7442478189 is a `hidden beast` number, since 7 + 442 + 47 + 81 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4725462564 + 2717015625 = 68742^2 + 52125^2 .

It is not a de Polignac number, because 7442478189 - 2³ = 7442478181 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 (7442478181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413471002 + ... + 413471019.

Almost surely, 2^7442478189 is an apocalyptic number.

It is an amenable number.

7442478189 is a deficient number, since it is larger than the sum of its proper divisors (3307768097).

7442478189 is a wasteful number, since it uses less digits than its factorization.

7442478189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826942027 (or 826942024 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 7442478189 is about 86269.7988232267. The cubic root of 7442478189 is about 1952.4167439906.

The spelling of 7442478189 in words is "seven billion, four hundred forty-two million, four hundred seventy-eight thousand, one hundred eighty-nine".