8639441428 has 12 divisors (see below), whose sum is σ = 15134599872. Its totient is φ = 4315270040.

The previous prime is 8639441413. The next prime is 8639441443. The reversal of 8639441428 is 8241449368.

It is an interprime number because it is at equal distance from previous prime (8639441413) and next prime (8639441443).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108300 + ... + 1116067.

It is an arithmetic number, because the mean of its divisors is an integer number (1261216656).

Almost surely, 2^8639441428 is an apocalyptic number.

It is an amenable number.

8639441428 is a deficient number, since it is larger than the sum of its proper divisors (6495158444).

8639441428 is a wasteful number, since it uses less digits than its factorization.

8639441428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225342 (or 2225340 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 8639441428 is about 92948.5956214509. The cubic root of 8639441428 is about 2051.9269153978.

The spelling of 8639441428 in words is "eight billion, six hundred thirty-nine million, four hundred forty-one thousand, four hundred twenty-eight".