28722471 has 16 divisors (see below), whose sum is σ = 41404800. Its totient is φ = 17648928.

The previous prime is 28722443. The next prime is 28722479. The reversal of 28722471 is 17422782.

It is not a de Polignac number, because 28722471 - 2¹⁴ = 28706087 is a prime.

It is a super-3 number, since 3×28722471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28722479) 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 15 ways as a sum of consecutive naturals, for example, 4701 + ... + 8918.

It is an arithmetic number, because the mean of its divisors is an integer number (2587800).

Almost surely, 2^28722471 is an apocalyptic number.

28722471 is a deficient number, since it is larger than the sum of its proper divisors (12682329).

28722471 is a wasteful number, since it uses less digits than its factorization.

28722471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13678.

The product of its digits is 12544, while the sum is 33.

The square root of 28722471 is about 5359.3349400835. The cubic root of 28722471 is about 306.2484739060.

The spelling of 28722471 in words is "twenty-eight million, seven hundred twenty-two thousand, four hundred seventy-one".