28100028494915 has 32 divisors (see below), whose sum is σ = 36516206702976. Its totient is φ = 20635187374080.

The previous prime is 28100028494893. The next prime is 28100028494969. The reversal of 28100028494915 is 51949482000182.

It is a Cunningham number, because it is equal to 5300946²-1.

It is not a de Polignac number, because 28100028494915 - 2¹² = 28100028490819 is a prime.

It is a super-2 number, since 2×28100028494915² (a number of 28 digits) contains 22 as substring.

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, 344520779 + ... + 344602331.

It is an arithmetic number, because the mean of its divisors is an integer number (1141131459468).

Almost surely, 2^{28100028494915} is an apocalyptic number.

28100028494915 is a deficient number, since it is larger than the sum of its proper divisors (8416178208061).

28100028494915 is a wasteful number, since it uses less digits than its factorization.

28100028494915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111039.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 28100028494915 in words is "twenty-eight trillion, one hundred billion, twenty-eight million, four hundred ninety-four thousand, nine hundred fifteen".