28637352 has 96 divisors (see below), whose sum is σ = 81081000. Its totient is φ = 9123840.

The previous prime is 28637347. The next prime is 28637359. The reversal of 28637352 is 25373682.

28637352 is a `hidden beast` number, since 286 + 373 + 5 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15634116 + 13003236 = 3954^2 + 3606^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28637359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262674 + ... + 262782.

Almost surely, 2^28637352 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 28637352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40540500).

28637352 is an abundant number, since it is smaller than the sum of its proper divisors (52443648).

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

28637352 is a wasteful number, since it uses less digits than its factorization.

28637352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 244 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 28637352 is about 5351.3878573693. The cubic root of 28637352 is about 305.9456522729.

The spelling of 28637352 in words is "twenty-eight million, six hundred thirty-seven thousand, three hundred fifty-two".