28929723 has 16 divisors (see below), whose sum is σ = 41596800. Its totient is φ = 17824320.

The previous prime is 28929689. The next prime is 28929751. The reversal of 28929723 is 32792982.

It is a de Polignac number, because none of the positive numbers 2^k-28929723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28929023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853 + ... + 8526.

It is an arithmetic number, because the mean of its divisors is an integer number (2599800).

Almost surely, 2^28929723 is an apocalyptic number.

28929723 is a deficient number, since it is larger than the sum of its proper divisors (12667077).

28929723 is a wasteful number, since it uses less digits than its factorization.

28929723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12442.

The product of its digits is 108864, while the sum is 42.

The square root of 28929723 is about 5378.6357935819. The cubic root of 28929723 is about 306.9833057232.

It can be divided in two parts, 2892972 and 3, that multiplied together give a square (8678916 = 2946²).

The spelling of 28929723 in words is "twenty-eight million, nine hundred twenty-nine thousand, seven hundred twenty-three".