28635953 has 4 divisors (see below), whose sum is σ = 29176308. Its totient is φ = 28095600.

The previous prime is 28635949. The next prime is 28635961. The reversal of 28635953 is 35953682.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23541904 + 5094049 = 4852^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28635953 - 2² = 28635949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28635953.

It is not an unprimeable number, because it can be changed into a prime (28635923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270098 + ... + 270203.

It is an arithmetic number, because the mean of its divisors is an integer number (7294077).

Almost surely, 2^28635953 is an apocalyptic number.

It is an amenable number.

28635953 is a deficient number, since it is larger than the sum of its proper divisors (540355).

28635953 is an equidigital number, since it uses as much as digits as its factorization.

28635953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540354.

The product of its digits is 194400, while the sum is 41.

The square root of 28635953 is about 5351.2571420181. The cubic root of 28635953 is about 305.9406701440.

The spelling of 28635953 in words is "twenty-eight million, six hundred thirty-five thousand, nine hundred fifty-three".