28049775 has 36 divisors (see below), whose sum is σ = 50240088. Its totient is φ = 13802880.

The previous prime is 28049759. The next prime is 28049789. The reversal of 28049775 is 57794082.

It is not a de Polignac number, because 28049775 - 2⁴ = 28049759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11569 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (1395558).

Almost surely, 2^28049775 is an apocalyptic number.

28049775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28049775 is a deficient number, since it is larger than the sum of its proper divisors (22190313).

28049775 is a wasteful number, since it uses less digits than its factorization.

28049775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252 (or 2234 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28049775 is about 5296.2038291591. The cubic root of 28049775 is about 303.8387266415.

The spelling of 28049775 in words is "twenty-eight million, forty-nine thousand, seven hundred seventy-five".