28578202 has 8 divisors (see below), whose sum is σ = 43268256. Its totient is φ = 14155452.

The previous prime is 28578197. The next prime is 28578203. The reversal of 28578202 is 20287582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28578203) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66558 + ... + 66985.

It is an arithmetic number, because the mean of its divisors is an integer number (5408532).

Almost surely, 2^28578202 is an apocalyptic number.

28578202 is a deficient number, since it is larger than the sum of its proper divisors (14690054).

28578202 is a wasteful number, since it uses less digits than its factorization.

28578202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133652.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 28578202 is about 5345.8583969275. The cubic root of 28578202 is about 305.7348651033.

It can be divided in two parts, 285 and 78202, that added together give a palindrome (78487).

The spelling of 28578202 in words is "twenty-eight million, five hundred seventy-eight thousand, two hundred two".