28908953 has 4 divisors (see below), whose sum is σ = 30165888. Its totient is φ = 27652020.

The previous prime is 28908947. The next prime is 28908961. The reversal of 28908953 is 35980982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28908953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28908973) 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, 628433 + ... + 628478.

It is an arithmetic number, because the mean of its divisors is an integer number (7541472).

Almost surely, 2^28908953 is an apocalyptic number.

28908953 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28908953 is a deficient number, since it is larger than the sum of its proper divisors (1256935).

28908953 is a wasteful number, since it uses less digits than its factorization.

28908953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256934.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 28908953 is about 5376.7046599195. The cubic root of 28908953 is about 306.9098222479.

The spelling of 28908953 in words is "twenty-eight million, nine hundred eight thousand, nine hundred fifty-three".