28101684 has 72 divisors (see below), whose sum is σ = 74676000. Its totient is φ = 8175168.

The previous prime is 28101683. The next prime is 28101691. The reversal of 28101684 is 48610182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28101683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56067 + ... + 56565.

Almost surely, 2^28101684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28101684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37338000).

28101684 is an abundant number, since it is smaller than the sum of its proper divisors (46574316).

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

28101684 is a wasteful number, since it uses less digits than its factorization.

28101684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28101684 is about 5301.1021495534. The cubic root of 28101684 is about 304.0260394362.

The spelling of 28101684 in words is "twenty-eight million, one hundred one thousand, six hundred eighty-four".