28205974 has 4 divisors (see below), whose sum is σ = 42308964. Its totient is φ = 14102986.

The previous prime is 28205963. The next prime is 28205977. The reversal of 28205974 is 47950282.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7051492 + ... + 7051495.

It is an arithmetic number, because the mean of its divisors is an integer number (10577241).

Almost surely, 2^28205974 is an apocalyptic number.

28205974 is a deficient number, since it is larger than the sum of its proper divisors (14102990).

28205974 is a wasteful number, since it uses less digits than its factorization.

28205974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14102989.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28205974 is about 5310.9296737954. The cubic root of 28205974 is about 304.4016721227.

The spelling of 28205974 in words is "twenty-eight million, two hundred five thousand, nine hundred seventy-four".