28888401 has 8 divisors (see below), whose sum is σ = 38544480. Its totient is φ = 19245632.

The previous prime is 28888397. The next prime is 28888427. The reversal of 28888401 is 10488882.

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 28888401 - 2² = 28888397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28888401.

It is not an unprimeable number, because it can be changed into a prime (28888451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4126 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (4818060).

Almost surely, 2^28888401 is an apocalyptic number.

It is an amenable number.

28888401 is a deficient number, since it is larger than the sum of its proper divisors (9656079).

28888401 is a wasteful number, since it uses less digits than its factorization.

28888401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6655.

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 28888401 is about 5374.7931122974. The cubic root of 28888401 is about 306.8370753957.

The spelling of 28888401 in words is "twenty-eight million, eight hundred eighty-eight thousand, four hundred one".