28734871 has 8 divisors (see below), whose sum is σ = 31395600. Its totient is φ = 26082240.

The previous prime is 28734869. The next prime is 28734887. The reversal of 28734871 is 17843782.

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 28734871 - 2¹ = 28734869 is a prime.

It is a super-2 number, since 2×28734871² = 1651385622773282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28734841) 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, 7285 + ... + 10513.

It is an arithmetic number, because the mean of its divisors is an integer number (3924450).

Almost surely, 2^28734871 is an apocalyptic number.

28734871 is a deficient number, since it is larger than the sum of its proper divisors (2660729).

28734871 is a wasteful number, since it uses less digits than its factorization.

28734871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4049.

The product of its digits is 75264, while the sum is 40.

The square root of 28734871 is about 5360.4916752104. The cubic root of 28734871 is about 306.2925385309.

It can be divided in two parts, 2873 and 4871, that added together give a square (7744 = 88²).

The spelling of 28734871 in words is "twenty-eight million, seven hundred thirty-four thousand, eight hundred seventy-one".