28402801 has 16 divisors (see below), whose sum is σ = 35078400. Its totient is φ = 22908480.

The previous prime is 28402793. The next prime is 28402807. The reversal of 28402801 is 10820482.

It is not a de Polignac number, because 28402801 - 2³ = 28402793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28402807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3396 + ... + 8266.

It is an arithmetic number, because the mean of its divisors is an integer number (2192400).

Almost surely, 2^28402801 is an apocalyptic number.

It is an amenable number.

28402801 is a deficient number, since it is larger than the sum of its proper divisors (6675599).

28402801 is an equidigital number, since it uses as much as digits as its factorization.

28402801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4909 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 28402801 is about 5329.4278304523. The cubic root of 28402801 is about 305.1080903281.

The spelling of 28402801 in words is "twenty-eight million, four hundred two thousand, eight hundred one".