28762801 has 4 divisors (see below), whose sum is σ = 29540212. Its totient is φ = 27985392.

The previous prime is 28762757. The next prime is 28762813. The reversal of 28762801 is 10826782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10826782 = 2 ⋅5413391.

It can be written as a sum of positive squares in 2 ways, for example, as 24453025 + 4309776 = 4945^2 + 2076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28762801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28762831) 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, 388650 + ... + 388723.

It is an arithmetic number, because the mean of its divisors is an integer number (7385053).

Almost surely, 2^28762801 is an apocalyptic number.

It is an amenable number.

28762801 is a deficient number, since it is larger than the sum of its proper divisors (777411).

28762801 is an equidigital number, since it uses as much as digits as its factorization.

28762801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777410.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28762801 is about 5363.0962139421. The cubic root of 28762801 is about 306.3917441313.

The spelling of 28762801 in words is "twenty-eight million, seven hundred sixty-two thousand, eight hundred one".