28018734 has 16 divisors (see below), whose sum is σ = 56363472. Its totient is φ = 9285248.

The previous prime is 28018733. The next prime is 28018747. The reversal of 28018734 is 43781082.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28018695 and 28018704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28018733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12459 + ... + 14534.

It is an arithmetic number, because the mean of its divisors is an integer number (3522717).

Almost surely, 2^28018734 is an apocalyptic number.

28018734 is an abundant number, since it is smaller than the sum of its proper divisors (28344738).

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

28018734 is a wasteful number, since it uses less digits than its factorization.

28018734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27171.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28018734 is about 5293.2725227405. The cubic root of 28018734 is about 303.7266052533.

The spelling of 28018734 in words is "twenty-eight million, eighteen thousand, seven hundred thirty-four".