28204730 has 32 divisors (see below), whose sum is σ = 53844480. Its totient is φ = 10618560.

The previous prime is 28204711. The next prime is 28204741. The reversal of 28204730 is 3740282.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 28204730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10241 + ... + 12699.

It is an arithmetic number, because the mean of its divisors is an integer number (1682640).

Almost surely, 2^28204730 is an apocalyptic number.

28204730 is a deficient number, since it is larger than the sum of its proper divisors (25639750).

28204730 is a wasteful number, since it uses less digits than its factorization.

28204730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28204730 is about 5310.8125555323. The cubic root of 28204730 is about 304.3971969330.

The spelling of 28204730 in words is "twenty-eight million, two hundred four thousand, seven hundred thirty".