28889641 has 8 divisors (see below), whose sum is σ = 31560768. Its totient is φ = 26226000.

The previous prime is 28889639. The next prime is 28889683. The reversal of 28889641 is 14698882.

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 28889641 - 2¹ = 28889639 is a prime.

It is a super-2 number, since 2×28889641² = 1669222714217762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28889591 and 28889600.

It is not an unprimeable number, because it can be changed into a prime (28889041) 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, 8956 + ... + 11746.

It is an arithmetic number, because the mean of its divisors is an integer number (3945096).

Almost surely, 2^28889641 is an apocalyptic number.

It is an amenable number.

28889641 is a deficient number, since it is larger than the sum of its proper divisors (2671127).

28889641 is a wasteful number, since it uses less digits than its factorization.

28889641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its digits is 221184, while the sum is 46.

The square root of 28889641 is about 5374.9084643369. The cubic root of 28889641 is about 306.8414655375.

The spelling of 28889641 in words is "twenty-eight million, eight hundred eighty-nine thousand, six hundred forty-one".