28706801 has 4 divisors (see below), whose sum is σ = 29317632. Its totient is φ = 28095972.

The previous prime is 28706773. The next prime is 28706809. The reversal of 28706801 is 10860782.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10860782 = 2 ⋅5430391.

It is a cyclic number.

It is not a de Polignac number, because 28706801 - 2¹⁸ = 28444657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28706809) 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, 305345 + ... + 305438.

It is an arithmetic number, because the mean of its divisors is an integer number (7329408).

Almost surely, 2^28706801 is an apocalyptic number.

It is an amenable number.

28706801 is a deficient number, since it is larger than the sum of its proper divisors (610831).

28706801 is an equidigital number, since it uses as much as digits as its factorization.

28706801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610830.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 28706801 is about 5357.8728055078. The cubic root of 28706801 is about 306.1927708695.

The spelling of 28706801 in words is "twenty-eight million, seven hundred six thousand, eight hundred one".