28607146 has 4 divisors (see below), whose sum is σ = 42910722. Its totient is φ = 14303572.

The previous prime is 28607129. The next prime is 28607149. The reversal of 28607146 is 64170682.

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., 14356521 + 14250625 = 3789^2 + 3775^2 .

It is not an unprimeable number, because it can be changed into a prime (28607149) 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 as a sum of consecutive naturals, namely, 7151785 + ... + 7151788.

Almost surely, 2^28607146 is an apocalyptic number.

28607146 is a deficient number, since it is larger than the sum of its proper divisors (14303576).

28607146 is a wasteful number, since it uses less digits than its factorization.

28607146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14303575.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28607146 is about 5348.5648542389. The cubic root of 28607146 is about 305.8380463570.

The spelling of 28607146 in words is "twenty-eight million, six hundred seven thousand, one hundred forty-six".