28027497015 has 96 divisors (see below), whose sum is σ = 61371380160. Its totient is φ = 12058841088.

The previous prime is 28027497007. The next prime is 28027497023. The reversal of 28027497015 is 51079472082.

It is a happy number.

28027497015 is a `hidden beast` number, since 280 + 274 + 97 + 0 + 15 = 666.

It is an interprime number because it is at equal distance from previous prime (28027497007) and next prime (28027497023).

It is not a de Polignac number, because 28027497015 - 2³ = 28027497007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12162 + ... + 237071.

It is an arithmetic number, because the mean of its divisors is an integer number (639285210).

Almost surely, 2^28027497015 is an apocalyptic number.

28027497015 is an abundant number, since it is smaller than the sum of its proper divisors (33343883145).

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

28027497015 is a wasteful number, since it uses less digits than its factorization.

28027497015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249278 (or 249265 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 28027497015 in words is "twenty-eight billion, twenty-seven million, four hundred ninety-seven thousand, fifteen".