28907136 has 96 divisors (see below), whose sum is σ = 86879520. Its totient is φ = 9208320.

The previous prime is 28907117. The next prime is 28907149. The reversal of 28907136 is 63170982.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28907136.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25951 + ... + 27041.

It is an arithmetic number, because the mean of its divisors is an integer number (904995).

Almost surely, 2^28907136 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 28907136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43439760).

28907136 is an abundant number, since it is smaller than the sum of its proper divisors (57972384).

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

28907136 is a wasteful number, since it uses less digits than its factorization.

28907136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 28907136 is about 5376.5356875966. The cubic root of 28907136 is about 306.9033920966.

The spelling of 28907136 in words is "twenty-eight million, nine hundred seven thousand, one hundred thirty-six".