28706741 has 4 divisors (see below), whose sum is σ = 32807712. Its totient is φ = 24605772.

The previous prime is 28706731. The next prime is 28706747. The reversal of 28706741 is 14760782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28706741 - 2⁶ = 28706677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050475 + ... + 2050488.

It is an arithmetic number, because the mean of its divisors is an integer number (8201928).

Almost surely, 2^28706741 is an apocalyptic number.

It is an amenable number.

28706741 is a deficient number, since it is larger than the sum of its proper divisors (4100971).

28706741 is an equidigital number, since it uses as much as digits as its factorization.

28706741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100970.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 28706741 is about 5357.8672062678. The cubic root of 28706741 is about 306.1925575451.

The spelling of 28706741 in words is "twenty-eight million, seven hundred six thousand, seven hundred forty-one".