28631471 has 8 divisors (see below), whose sum is σ = 31297104. Its totient is φ = 25976320.

The previous prime is 28631467. The next prime is 28631479. The reversal of 28631471 is 17413682.

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 28631471 - 2² = 28631467 is a prime.

It is a super-3 number, since 3×28631471³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631479) 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, 3791 + ... + 8463.

It is an arithmetic number, because the mean of its divisors is an integer number (3912138).

Almost surely, 2^28631471 is an apocalyptic number.

28631471 is a deficient number, since it is larger than the sum of its proper divisors (2665633).

28631471 is a wasteful number, since it uses less digits than its factorization.

28631471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241.

The product of its digits is 8064, while the sum is 32.

The square root of 28631471 is about 5350.8383455305. The cubic root of 28631471 is about 305.9247077205.

It can be divided in two parts, 2863 and 1471, that added together give a palindrome (4334).

The spelling of 28631471 in words is "twenty-eight million, six hundred thirty-one thousand, four hundred seventy-one".