28779042 has 32 divisors (see below), whose sum is σ = 58609152. Its totient is φ = 9419904.

The previous prime is 28779017. The next prime is 28779043. The reversal of 28779042 is 24097782.

It is not an unprimeable number, because it can be changed into a prime (28779043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128943 + ... + 129165.

It is an arithmetic number, because the mean of its divisors is an integer number (1831536).

Almost surely, 2^28779042 is an apocalyptic number.

28779042 is an abundant number, since it is smaller than the sum of its proper divisors (29830110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28779042 is a wasteful number, since it uses less digits than its factorization.

28779042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 28779042 is about 5364.6101442696. The cubic root of 28779042 is about 306.4494016130.

The spelling of 28779042 in words is "twenty-eight million, seven hundred seventy-nine thousand, forty-two".