28171416 has 64 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 7429248.

The previous prime is 28171411. The next prime is 28171421. The reversal of 28171416 is 61417182.

It is an interprime number because it is at equal distance from previous prime (28171411) and next prime (28171421).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28171411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4266 + ... + 8633.

It is an arithmetic number, because the mean of its divisors is an integer number (1354500).

Almost surely, 2^28171416 is an apocalyptic number.

28171416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28171416 is an abundant number, since it is smaller than the sum of its proper divisors (58516584).

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

28171416 is a wasteful number, since it uses less digits than its factorization.

28171416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12928 (or 12924 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 28171416 is about 5307.6751972968. The cubic root of 28171416 is about 304.2773035275.

Adding to 28171416 its reverse (61417182), we get a palindrome (89588598).

The spelling of 28171416 in words is "twenty-eight million, one hundred seventy-one thousand, four hundred sixteen".