28645706 has 4 divisors (see below), whose sum is σ = 42968562. Its totient is φ = 14322852.

The previous prime is 28645699. The next prime is 28645717. The reversal of 28645706 is 60754682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60754682 = 2 ⋅30377341.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 502681 = 5305^2 + 709^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28645706.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7161425 + ... + 7161428.

Almost surely, 2^28645706 is an apocalyptic number.

28645706 is a deficient number, since it is larger than the sum of its proper divisors (14322856).

28645706 is a wasteful number, since it uses less digits than its factorization.

28645706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322855.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 28645706 is about 5352.1683456334. The cubic root of 28645706 is about 305.9753992212.

The spelling of 28645706 in words is "twenty-eight million, six hundred forty-five thousand, seven hundred six".