28769402 has 4 divisors (see below), whose sum is σ = 43154106. Its totient is φ = 14384700.

The previous prime is 28769383. The next prime is 28769449. The reversal of 28769402 is 20496782.

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

It can be written as a sum of positive squares in only one way, i.e., 22363441 + 6405961 = 4729^2 + 2531^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7192349 + ... + 7192352.

Almost surely, 2^28769402 is an apocalyptic number.

28769402 is a deficient number, since it is larger than the sum of its proper divisors (14384704).

28769402 is a wasteful number, since it uses less digits than its factorization.

28769402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14384703.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 28769402 is about 5363.7115880703. The cubic root of 28769402 is about 306.4151810838.

The spelling of 28769402 in words is "twenty-eight million, seven hundred sixty-nine thousand, four hundred two".