28613511 has 6 divisors (see below), whose sum is σ = 41330640. Its totient is φ = 19075668.

The previous prime is 28613491. The next prime is 28613537. The reversal of 28613511 is 11531682.

It is not a de Polignac number, because 28613511 - 2⁵ = 28613479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28613551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1589631 + ... + 1589648.

It is an arithmetic number, because the mean of its divisors is an integer number (6888440).

Almost surely, 2^28613511 is an apocalyptic number.

28613511 is a deficient number, since it is larger than the sum of its proper divisors (12717129).

28613511 is a wasteful number, since it uses less digits than its factorization.

28613511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179285 (or 3179282 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 28613511 is about 5349.1598405731. The cubic root of 28613511 is about 305.8607273427.

It can be divided in two parts, 286135 and 11, that added together give a triangular number (286146 = T₇₅₆).

The spelling of 28613511 in words is "twenty-eight million, six hundred thirteen thousand, five hundred eleven".