28069955 has 4 divisors (see below), whose sum is σ = 33683952. Its totient is φ = 22455960.

The previous prime is 28069919. The next prime is 28069981. The reversal of 28069955 is 55996082.

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

It is not a de Polignac number, because 28069955 - 2⁶ = 28069891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806991 + ... + 2807000.

It is an arithmetic number, because the mean of its divisors is an integer number (8420988).

Almost surely, 2^28069955 is an apocalyptic number.

28069955 is a deficient number, since it is larger than the sum of its proper divisors (5613997).

28069955 is an equidigital number, since it uses as much as digits as its factorization.

28069955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613996.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 28069955 is about 5298.1086247830. The cubic root of 28069955 is about 303.9115732828.

The spelling of 28069955 in words is "twenty-eight million, sixty-nine thousand, nine hundred fifty-five".