28171395 has 80 divisors (see below), whose sum is σ = 60867840. Its totient is φ = 12177216.

The previous prime is 28171391. The next prime is 28171399. The reversal of 28171395 is 59317182.

It is an interprime number because it is at equal distance from previous prime (28171391) and next prime (28171399).

It is not a de Polignac number, because 28171395 - 2² = 28171391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28171391) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 53604 + ... + 54126.

It is an arithmetic number, because the mean of its divisors is an integer number (760848).

Almost surely, 2^28171395 is an apocalyptic number.

28171395 is an abundant number, since it is smaller than the sum of its proper divisors (32696445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28171395 is a wasteful number, since it uses less digits than its factorization.

28171395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 557 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 28171395 is about 5307.6732190292. The cubic root of 28171395 is about 304.2772279210.

The spelling of 28171395 in words is "twenty-eight million, one hundred seventy-one thousand, three hundred ninety-five".