28889001 has 16 divisors (see below), whose sum is σ = 45316800. Its totient is φ = 18126144.

The previous prime is 28888997. The next prime is 28889009. The reversal of 28889001 is 10098882.

It is not a de Polignac number, because 28889001 - 2² = 28888997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28889009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31011 + ... + 31928.

It is an arithmetic number, because the mean of its divisors is an integer number (2832300).

Almost surely, 2^28889001 is an apocalyptic number.

It is an amenable number.

28889001 is a deficient number, since it is larger than the sum of its proper divisors (16427799).

28889001 is a wasteful number, since it uses less digits than its factorization.

28889001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62965 (or 62959 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 28889001 is about 5374.8489281095. The cubic root of 28889001 is about 306.8391996735.

The spelling of 28889001 in words is "twenty-eight million, eight hundred eighty-nine thousand, one".