28709461 has 8 divisors (see below), whose sum is σ = 31399200. Its totient is φ = 26033040.

The previous prime is 28709453. The next prime is 28709519. The reversal of 28709461 is 16490782.

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

It is not a de Polignac number, because 28709461 - 2³ = 28709453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28709461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28709761) 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, 1495 + ... + 7723.

It is an arithmetic number, because the mean of its divisors is an integer number (3924900).

Almost surely, 2^28709461 is an apocalyptic number.

It is an amenable number.

28709461 is a deficient number, since it is larger than the sum of its proper divisors (2689739).

28709461 is a wasteful number, since it uses less digits than its factorization.

28709461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28709461 is about 5358.1210326009. The cubic root of 28709461 is about 306.2022279503.

The spelling of 28709461 in words is "twenty-eight million, seven hundred nine thousand, four hundred sixty-one".