28065740 has 12 divisors (see below), whose sum is σ = 58938096. Its totient is φ = 11226288.

The previous prime is 28065733. The next prime is 28065767. The reversal of 28065740 is 4756082.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28065697 and 28065706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701624 + ... + 701663.

It is an arithmetic number, because the mean of its divisors is an integer number (4911508).

Almost surely, 2^28065740 is an apocalyptic number.

28065740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28065740 is an abundant number, since it is smaller than the sum of its proper divisors (30872356).

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

28065740 is a wasteful number, since it uses less digits than its factorization.

28065740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403296 (or 1403294 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28065740 is about 5297.7108263853. The cubic root of 28065740 is about 303.8963606779.

The spelling of 28065740 in words is "twenty-eight million, sixty-five thousand, seven hundred forty".