28147801 has 8 divisors (see below), whose sum is σ = 32513184. Its totient is φ = 24083520.

The previous prime is 28147793. The next prime is 28147807. The reversal of 28147801 is 10874182.

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 28147801 - 2³ = 28147793 is a prime.

It is a super-2 number, since 2×28147801² = 1584597402271202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28147807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75075 + ... + 75448.

It is an arithmetic number, because the mean of its divisors is an integer number (4064148).

Almost surely, 2^28147801 is an apocalyptic number.

It is an amenable number.

28147801 is a deficient number, since it is larger than the sum of its proper divisors (4365383).

28147801 is a wasteful number, since it uses less digits than its factorization.

28147801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150551.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 28147801 is about 5305.4501222799. The cubic root of 28147801 is about 304.1922584918.

The spelling of 28147801 in words is "twenty-eight million, one hundred forty-seven thousand, eight hundred one".