28490001 has 8 divisors (see below), whose sum is σ = 38132160. Its totient is φ = 18920592.

The previous prime is 28489969. The next prime is 28490009. The reversal of 28490001 is 10009482.

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

It is not a de Polignac number, because 28490001 - 2⁵ = 28489969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28490009) 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, 17266 + ... + 18843.

It is an arithmetic number, because the mean of its divisors is an integer number (4766520).

Almost surely, 2^28490001 is an apocalyptic number.

It is an amenable number.

28490001 is a deficient number, since it is larger than the sum of its proper divisors (9642159).

28490001 is a wasteful number, since it uses less digits than its factorization.

28490001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36375.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 28490001 is about 5337.6025517080. The cubic root of 28490001 is about 305.4200107914.

Adding to 28490001 its reverse (10009482), we get a palindrome (38499483).

The spelling of 28490001 in words is "twenty-eight million, four hundred ninety thousand, one".