28034989 has 8 divisors (see below), whose sum is σ = 30103488. Its totient is φ = 26013120.

The previous prime is 28034977. The next prime is 28035001. The reversal of 28034989 is 98943082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28034977) and next prime (28035001).

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 28034989 - 2⁵ = 28034957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28034959) 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, 10407 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (3762936).

Almost surely, 2^28034989 is an apocalyptic number.

It is an amenable number.

28034989 is a deficient number, since it is larger than the sum of its proper divisors (2068499).

28034989 is a wasteful number, since it uses less digits than its factorization.

28034989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23315.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 28034989 is about 5294.8077396635. The cubic root of 28034989 is about 303.7853293143.

The spelling of 28034989 in words is "twenty-eight million, thirty-four thousand, nine hundred eighty-nine".