28526730 has 32 divisors (see below), whose sum is σ = 69177024. Its totient is φ = 7527936.

The previous prime is 28526723. The next prime is 28526767. The reversal of 28526730 is 3762582.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28526691 and 28526700.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1992 + ... + 7811.

It is an arithmetic number, because the mean of its divisors is an integer number (2161782).

Almost surely, 2^28526730 is an apocalyptic number.

28526730 is an abundant number, since it is smaller than the sum of its proper divisors (40650294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28526730 is a wasteful number, since it uses less digits than its factorization.

28526730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28526730 is about 5341.0420331617. The cubic root of 28526730 is about 305.5512024847.

The spelling of 28526730 in words is "twenty-eight million, five hundred twenty-six thousand, seven hundred thirty".