28727951 has 16 divisors (see below), whose sum is σ = 34698240. Its totient is φ = 23261280.

The previous prime is 28727927. The next prime is 28727953. The reversal of 28727951 is 15972782.

It is not a de Polignac number, because 28727951 - 2⁶ = 28727887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28727899 and 28727908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28727953) 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, 8036 + ... + 11046.

It is an arithmetic number, because the mean of its divisors is an integer number (2168640).

Almost surely, 2^28727951 is an apocalyptic number.

28727951 is a deficient number, since it is larger than the sum of its proper divisors (5970289).

28727951 is a wasteful number, since it uses less digits than its factorization.

28727951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094.

The product of its digits is 70560, while the sum is 41.

The square root of 28727951 is about 5359.8461731658. The cubic root of 28727951 is about 306.2679491909.

The spelling of 28727951 in words is "twenty-eight million, seven hundred twenty-seven thousand, nine hundred fifty-one".