28505302 has 16 divisors (see below), whose sum is σ = 50003712. Its totient is φ = 11932200.

The previous prime is 28505261. The next prime is 28505329. The reversal of 28505302 is 20350582.

It is a super-2 number, since 2×28505302² = 1625104484222408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23074 + ... + 24277.

It is an arithmetic number, because the mean of its divisors is an integer number (3125232).

Almost surely, 2^28505302 is an apocalyptic number.

28505302 is a deficient number, since it is larger than the sum of its proper divisors (21498410).

28505302 is a wasteful number, since it uses less digits than its factorization.

28505302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47403.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 28505302 is about 5339.0356807199. The cubic root of 28505302 is about 305.4746778683.

Adding to 28505302 its reverse (20350582), we get a palindrome (48855884).

The spelling of 28505302 in words is "twenty-eight million, five hundred five thousand, three hundred two".