28649423 has 8 divisors (see below), whose sum is σ = 31694976. Its totient is φ = 25677400.

The previous prime is 28649407. The next prime is 28649459. The reversal of 28649423 is 32494682.

It is a happy number.

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 28649423 - 2⁴ = 28649407 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 (28649483) 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, 17561 + ... + 19122.

It is an arithmetic number, because the mean of its divisors is an integer number (3961872).

Almost surely, 2^28649423 is an apocalyptic number.

28649423 is a deficient number, since it is larger than the sum of its proper divisors (3045553).

28649423 is a wasteful number, since it uses less digits than its factorization.

28649423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36765.

The product of its digits is 82944, while the sum is 38.

The square root of 28649423 is about 5352.5155768106. The cubic root of 28649423 is about 305.9886328669.

The spelling of 28649423 in words is "twenty-eight million, six hundred forty-nine thousand, four hundred twenty-three".