8081280428 has 24 divisors (see below), whose sum is σ = 15364896288. Its totient is φ = 3696811776.

The previous prime is 8081280413. The next prime is 8081280457. The reversal of 8081280428 is 8240821808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681776 + ... + 693527.

It is an arithmetic number, because the mean of its divisors is an integer number (640204012).

Almost surely, 2^8081280428 is an apocalyptic number.

It is an amenable number.

8081280428 is a deficient number, since it is larger than the sum of its proper divisors (7283615860).

8081280428 is a wasteful number, since it uses less digits than its factorization.

8081280428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375433 (or 1375431 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 41.

The square root of 8081280428 is about 89895.9422221048. The cubic root of 8081280428 is about 2006.7505583457.

The spelling of 8081280428 in words is "eight billion, eighty-one million, two hundred eighty thousand, four hundred twenty-eight".