28885251 has 8 divisors (see below), whose sum is σ = 38550544. Its totient is φ = 19238400.

The previous prime is 28885249. The next prime is 28885253. The reversal of 28885251 is 15258882.

It is an interprime number because it is at equal distance from previous prime (28885249) and next prime (28885253).

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

It is not a de Polignac number, because 28885251 - 2¹ = 28885249 is a prime.

It is the 5375-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28885253) by changing a digit.

It is a nontrivial repunit in base 5374.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406 + ... + 7611.

It is an arithmetic number, because the mean of its divisors is an integer number (4818818).

Almost surely, 2^28885251 is an apocalyptic number.

28885251 is a deficient number, since it is larger than the sum of its proper divisors (9665293).

28885251 is a wasteful number, since it uses less digits than its factorization.

28885251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221.

The product of its digits is 51200, while the sum is 39.

The square root of 28885251 is about 5374.5000697739. The cubic root of 28885251 is about 306.8259224544.

The spelling of 28885251 in words is "twenty-eight million, eight hundred eighty-five thousand, two hundred fifty-one".