28071960 has 128 divisors (see below), whose sum is σ = 100500480. Its totient is φ = 6133248.

The previous prime is 28071959. The next prime is 28071961. The reversal of 28071960 is 6917082.

It is an interprime number because it is at equal distance from previous prime (28071959) and next prime (28071961).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18594 + ... + 20046.

It is an arithmetic number, because the mean of its divisors is an integer number (785160).

Almost surely, 2^28071960 is an apocalyptic number.

28071960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28071960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50250240).

28071960 is an abundant number, since it is smaller than the sum of its proper divisors (72428520).

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

28071960 is a wasteful number, since it uses less digits than its factorization.

28071960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 28071960 is about 5298.2978398727. The cubic root of 28071960 is about 303.9188091119.

The spelling of 28071960 in words is "twenty-eight million, seventy-one thousand, nine hundred sixty".