28770123 has 16 divisors (see below), whose sum is σ = 40953600. Its totient is φ = 17912160.

The previous prime is 28770113. The next prime is 28770143. The reversal of 28770123 is 32107782.

It is not a de Polignac number, because 28770123 - 2²² = 24575819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28770113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (2559600).

Almost surely, 2^28770123 is an apocalyptic number.

28770123 is a deficient number, since it is larger than the sum of its proper divisors (12183477).

28770123 is a wasteful number, since it uses less digits than its factorization.

28770123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 28770123 is about 5363.7787985710. The cubic root of 28770123 is about 306.4177407882.

The spelling of 28770123 in words is "twenty-eight million, seven hundred seventy thousand, one hundred twenty-three".