28013801 has 8 divisors (see below), whose sum is σ = 28998144. Its totient is φ = 27034560.

The previous prime is 28013767. The next prime is 28013803. The reversal of 28013801 is 10831082.

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

It is a cyclic number.

It is not a de Polignac number, because 28013801 - 2⁶ = 28013737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28013803) 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, 12380 + ... + 14466.

It is an arithmetic number, because the mean of its divisors is an integer number (3624768).

Almost surely, 2^28013801 is an apocalyptic number.

It is an amenable number.

28013801 is a deficient number, since it is larger than the sum of its proper divisors (984343).

28013801 is a wasteful number, since it uses less digits than its factorization.

28013801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 28013801 is about 5292.8065333998. The cubic root of 28013801 is about 303.7087794267.

Adding to 28013801 its reverse (10831082), we get a palindrome (38844883).

The spelling of 28013801 in words is "twenty-eight million, thirteen thousand, eight hundred one".