28450634 has 4 divisors (see below), whose sum is σ = 42675954. Its totient is φ = 14225316.

The previous prime is 28450633. The next prime is 28450663. The reversal of 28450634 is 43605482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43605482 = 2 ⋅21802741.

It can be written as a sum of positive squares in only one way, i.e., 21187609 + 7263025 = 4603^2 + 2695^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28450634.

It is not an unprimeable number, because it can be changed into a prime (28450633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7112657 + ... + 7112660.

Almost surely, 2^28450634 is an apocalyptic number.

28450634 is a deficient number, since it is larger than the sum of its proper divisors (14225320).

28450634 is a wasteful number, since it uses less digits than its factorization.

28450634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14225319.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 28450634 is about 5333.9135726031. The cubic root of 28450634 is about 305.2792712180.

The spelling of 28450634 in words is "twenty-eight million, four hundred fifty thousand, six hundred thirty-four".