28247303136 has 96 divisors (see below), whose sum is σ = 80136120960. Its totient is φ = 8660657664.

The previous prime is 28247303047. The next prime is 28247303143. The reversal of 28247303136 is 63130374282.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28247303094 and 28247303103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313195 + ... + 393173.

It is an arithmetic number, because the mean of its divisors is an integer number (834751260).

Almost surely, 2^28247303136 is an apocalyptic number.

28247303136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28247303136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40068060480).

28247303136 is an abundant number, since it is smaller than the sum of its proper divisors (51888817824).

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

28247303136 is a wasteful number, since it uses less digits than its factorization.

28247303136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80288 (or 80280 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 28247303136 in words is "twenty-eight billion, two hundred forty-seven million, three hundred three thousand, one hundred thirty-six".