28028187015 has 32 divisors (see below), whose sum is σ = 46334908416. Its totient is φ = 14452663680.

The previous prime is 28028186999. The next prime is 28028187023. The reversal of 28028187015 is 51078182082.

It is not a de Polignac number, because 28028187015 - 2⁴ = 28028186999 is a prime.

It is a super-2 number, since 2×28028187015² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480672 + ... + 535818.

It is an arithmetic number, because the mean of its divisors is an integer number (1447965888).

Almost surely, 2^28028187015 is an apocalyptic number.

28028187015 is a deficient number, since it is larger than the sum of its proper divisors (18306721401).

28028187015 is a wasteful number, since it uses less digits than its factorization.

28028187015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56279.

The product of its (nonzero) digits is 71680, while the sum is 42.

The spelling of 28028187015 in words is "twenty-eight billion, twenty-eight million, one hundred eighty-seven thousand, fifteen".