28078264602 has 112 divisors (see below), whose sum is σ = 64989124200. Its totient is φ = 9088588800.

The previous prime is 28078264589. The next prime is 28078264603. The reversal of 28078264602 is 20646287082.

It can be written as a sum of positive squares in 4 ways, for example, as 24245292681 + 3832971921 = 155709^2 + 61911^2 .

It is not an unprimeable number, because it can be changed into a prime (28078264603) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 14405524 + ... + 14407472.

Almost surely, 2^28078264602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28078264602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32494562100).

28078264602 is an abundant number, since it is smaller than the sum of its proper divisors (36910859598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28078264602 is a wasteful number, since it uses less digits than its factorization.

28078264602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 28078264602 in words is "twenty-eight billion, seventy-eight million, two hundred sixty-four thousand, six hundred two".