28271951 has 8 divisors (see below), whose sum is σ = 28796064. Its totient is φ = 27751680.

The previous prime is 28271933. The next prime is 28271963. The reversal of 28271951 is 15917282.

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

It is a de Polignac number, because none of the positive numbers 2^k-28271951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271921) 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, 16790 + ... + 18396.

It is an arithmetic number, because the mean of its divisors is an integer number (3599508).

Almost surely, 2^28271951 is an apocalyptic number.

28271951 is a deficient number, since it is larger than the sum of its proper divisors (524113).

28271951 is a wasteful number, since it uses less digits than its factorization.

28271951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its digits is 10080, while the sum is 35.

The square root of 28271951 is about 5317.1374817659. The cubic root of 28271951 is about 304.6388307500.

The spelling of 28271951 in words is "twenty-eight million, two hundred seventy-one thousand, nine hundred fifty-one".