28171963 has 8 divisors (see below), whose sum is σ = 30084480. Its totient is φ = 26322240.

The previous prime is 28171951. The next prime is 28171967. The reversal of 28171963 is 36917182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28171963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28171967) 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, 14770 + ... + 16567.

It is an arithmetic number, because the mean of its divisors is an integer number (3760560).

Almost surely, 2^28171963 is an apocalyptic number.

28171963 is a deficient number, since it is larger than the sum of its proper divisors (1912517).

28171963 is a wasteful number, since it uses less digits than its factorization.

28171963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31397.

The product of its digits is 18144, while the sum is 37.

The square root of 28171963 is about 5307.7267261983. The cubic root of 28171963 is about 304.2792728831.

It can be divided in two parts, 28 and 171963, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 28171963 in words is "twenty-eight million, one hundred seventy-one thousand, nine hundred sixty-three".