28261790 has 8 divisors (see below), whose sum is σ = 50871240. Its totient is φ = 11304712.

The previous prime is 28261789. The next prime is 28261811. The reversal of 28261790 is 9716282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28261790.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413080 + ... + 1413099.

It is an arithmetic number, because the mean of its divisors is an integer number (6358905).

Almost surely, 2^28261790 is an apocalyptic number.

28261790 is a deficient number, since it is larger than the sum of its proper divisors (22609450).

28261790 is a wasteful number, since it uses less digits than its factorization.

28261790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826186.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 28261790 is about 5316.1819005749. The cubic root of 28261790 is about 304.6023304266.

The spelling of 28261790 in words is "twenty-eight million, two hundred sixty-one thousand, seven hundred ninety".