28278330802 has 8 divisors (see below), whose sum is σ = 42463158300. Its totient is φ = 14123944704.

The previous prime is 28278330767. The next prime is 28278330809. The reversal of 28278330802 is 20803387282.

It can be written as a sum of positive squares in 2 ways, for example, as 19549352761 + 8728978041 = 139819^2 + 93429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28278330809) 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, 7608027 + ... + 7611742.

Almost surely, 2^28278330802 is an apocalyptic number.

28278330802 is a deficient number, since it is larger than the sum of its proper divisors (14184827498).

28278330802 is a wasteful number, since it uses less digits than its factorization.

28278330802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15220700.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 28278330802 in words is "twenty-eight billion, two hundred seventy-eight million, three hundred thirty thousand, eight hundred two".