28234745 has 48 divisors (see below), whose sum is σ = 43666560. Its totient is φ = 17149440.

The previous prime is 28234729. The next prime is 28234747. The reversal of 28234745 is 54743282.

28234745 = T₁₇₄ + T₁₇₅ + ... + T₅₅₈.

It is not a de Polignac number, because 28234745 - 2⁴ = 28234729 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28234747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 249809 + ... + 249921.

It is an arithmetic number, because the mean of its divisors is an integer number (909720).

Almost surely, 2^28234745 is an apocalyptic number.

It is an amenable number.

28234745 is a deficient number, since it is larger than the sum of its proper divisors (15431815).

28234745 is a wasteful number, since it uses less digits than its factorization.

28234745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 195 counting only the distinct ones).

The product of its digits is 53760, while the sum is 35.

The square root of 28234745 is about 5313.6376428959. The cubic root of 28234745 is about 304.5051367811.

The spelling of 28234745 in words is "twenty-eight million, two hundred thirty-four thousand, seven hundred forty-five".