28251634 has 8 divisors (see below), whose sum is σ = 42578928. Its totient is φ = 14058660.

The previous prime is 28251631. The next prime is 28251673. The reversal of 28251634 is 43615282.

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

It is a junction number, because it is equal to n+sod(n) for n = 28251596 and 28251605.

It is not an unprimeable number, because it can be changed into a prime (28251631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33052 + ... + 33895.

It is an arithmetic number, because the mean of its divisors is an integer number (5322366).

Almost surely, 2^28251634 is an apocalyptic number.

28251634 is a deficient number, since it is larger than the sum of its proper divisors (14327294).

28251634 is a wasteful number, since it uses less digits than its factorization.

28251634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67160.

The product of its digits is 11520, while the sum is 31.

The square root of 28251634 is about 5315.2266179346. The cubic root of 28251634 is about 304.5658393208.

The spelling of 28251634 in words is "twenty-eight million, two hundred fifty-one thousand, six hundred thirty-four".