28049623 has 8 divisors (see below), whose sum is σ = 32142240. Its totient is φ = 23978400.

The previous prime is 28049611. The next prime is 28049633. The reversal of 28049623 is 32694082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28049623 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 (28049633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2428 + ... + 7873.

It is an arithmetic number, because the mean of its divisors is an integer number (4017780).

Almost surely, 2^28049623 is an apocalyptic number.

28049623 is a deficient number, since it is larger than the sum of its proper divisors (4092617).

28049623 is a wasteful number, since it uses less digits than its factorization.

28049623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28049623 is about 5296.1894792388. The cubic root of 28049623 is about 303.8381778127.

The spelling of 28049623 in words is "twenty-eight million, forty-nine thousand, six hundred twenty-three".