28148706 has 12 divisors (see below), whose sum is σ = 60988902. Its totient is φ = 9382896.

The previous prime is 28148699. The next prime is 28148717. The reversal of 28148706 is 60784182.

It can be written as a sum of positive squares in only one way, i.e., 27468081 + 680625 = 5241^2 + 825^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 781891 + ... + 781926.

Almost surely, 2^28148706 is an apocalyptic number.

28148706 is an abundant number, since it is smaller than the sum of its proper divisors (32840196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28148706 is a wasteful number, since it uses less digits than its factorization.

28148706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563825 (or 1563822 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28148706 is about 5305.5354112474. The cubic root of 28148706 is about 304.1955185575.

The spelling of 28148706 in words is "twenty-eight million, one hundred forty-eight thousand, seven hundred six".