28488933 has 24 divisors (see below), whose sum is σ = 46444320. Its totient is φ = 16668960.

The previous prime is 28488913. The next prime is 28488953. The reversal of 28488933 is 33988482.

It is an interprime number because it is at equal distance from previous prime (28488913) and next prime (28488953).

It is not a de Polignac number, because 28488933 - 2¹⁰ = 28487909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28488913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2091 + ... + 7832.

It is an arithmetic number, because the mean of its divisors is an integer number (1935180).

Almost surely, 2^28488933 is an apocalyptic number.

It is an amenable number.

28488933 is a deficient number, since it is larger than the sum of its proper divisors (17955387).

28488933 is a wasteful number, since it uses less digits than its factorization.

28488933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9969 (or 9966 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28488933 is about 5337.5025058542. The cubic root of 28488933 is about 305.4161943337.

It can be divided in two parts, 2848 and 8933, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 28488933 in words is "twenty-eight million, four hundred eighty-eight thousand, nine hundred thirty-three".