28770929 has 8 divisors (see below), whose sum is σ = 32469120. Its totient is φ = 25253200.

The previous prime is 28770899. The next prime is 28770943. The reversal of 28770929 is 92907782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28770929 - 2⁸ = 28770673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28770929.

It is not an unprimeable number, because it can be changed into a prime (28770029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44777 + ... + 45414.

It is an arithmetic number, because the mean of its divisors is an integer number (4058640).

Almost surely, 2^28770929 is an apocalyptic number.

28770929 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28770929 is a deficient number, since it is larger than the sum of its proper divisors (3698191).

28770929 is a wasteful number, since it uses less digits than its factorization.

28770929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90231.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 28770929 is about 5363.8539316428. The cubic root of 28770929 is about 306.4206022103.

The spelling of 28770929 in words is "twenty-eight million, seven hundred seventy thousand, nine hundred twenty-nine".