28025860111 has 16 divisors (see below), whose sum is σ = 30808800000. Its totient is φ = 25375603968.

The previous prime is 28025859989. The next prime is 28025860199. The reversal of 28025860111 is 11106852082.

It is a cyclic number.

It is not a de Polignac number, because 28025860111 - 2⁹ = 28025859599 is a prime.

It is a super-2 number, since 2×28025860111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28025866111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520140 + ... + 571486.

It is an arithmetic number, because the mean of its divisors is an integer number (1925550000).

Almost surely, 2^28025860111 is an apocalyptic number.

28025860111 is a deficient number, since it is larger than the sum of its proper divisors (2782939889).

28025860111 is a wasteful number, since it uses less digits than its factorization.

28025860111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52638.

The product of its (nonzero) digits is 7680, while the sum is 34.

The spelling of 28025860111 in words is "twenty-eight billion, twenty-five million, eight hundred sixty thousand, one hundred eleven".