28100736 has 128 divisors (see below), whose sum is σ = 85190400. Its totient is φ = 9114624.

The previous prime is 28100719. The next prime is 28100741. The reversal of 28100736 is 63700182.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162346 + ... + 162518.

It is an arithmetic number, because the mean of its divisors is an integer number (665550).

Almost surely, 2^28100736 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 28100736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42595200).

28100736 is an abundant number, since it is smaller than the sum of its proper divisors (57089664).

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

28100736 is a wasteful number, since it uses less digits than its factorization.

28100736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 28100736 is about 5301.0127334312. The cubic root of 28100736 is about 304.0226206621.

The spelling of 28100736 in words is "twenty-eight million, one hundred thousand, seven hundred thirty-six".