28304502 has 16 divisors (see below), whose sum is σ = 56678400. Its totient is φ = 9423272.

The previous prime is 28304489. The next prime is 28304527. The reversal of 28304502 is 20540382.

It is a super-2 number, since 2×28304502² = 1602289666936008, 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, 3499 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (3542400).

Almost surely, 2^28304502 is an apocalyptic number.

28304502 is an abundant number, since it is smaller than the sum of its proper divisors (28373898).

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

28304502 is a wasteful number, since it uses less digits than its factorization.

28304502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28304502 is about 5320.1975527230. The cubic root of 28304502 is about 304.7557015347.

Adding to 28304502 its reverse (20540382), we get a palindrome (48844884).

The spelling of 28304502 in words is "twenty-eight million, three hundred four thousand, five hundred two".