28731953 has 8 divisors (see below), whose sum is σ = 30014400. Its totient is φ = 27469008.

The previous prime is 28731949. The next prime is 28731973. The reversal of 28731953 is 35913782.

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

It is a cyclic number.

It is not a de Polignac number, because 28731953 - 2² = 28731949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28731973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1823 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (3751800).

Almost surely, 2^28731953 is an apocalyptic number.

It is an amenable number.

28731953 is a deficient number, since it is larger than the sum of its proper divisors (1282447).

28731953 is a wasteful number, since it uses less digits than its factorization.

28731953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9751.

The product of its digits is 45360, while the sum is 38.

The square root of 28731953 is about 5360.2194917746. The cubic root of 28731953 is about 306.2821702704.

The spelling of 28731953 in words is "twenty-eight million, seven hundred thirty-one thousand, nine hundred fifty-three".