28150668 has 108 divisors (see below), whose sum is σ = 88194288. Its totient is φ = 7413120.

The previous prime is 28150663. The next prime is 28150669. The reversal of 28150668 is 86605182.

It is a happy number.

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 (28150663) 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 35 ways as a sum of consecutive naturals, for example, 42258 + ... + 42918.

Almost surely, 2^28150668 is an apocalyptic number.

28150668 is a gapful number since it is divisible by the number (28) 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 28150668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44097144).

28150668 is an abundant number, since it is smaller than the sum of its proper divisors (60043620).

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

28150668 is a wasteful number, since it uses less digits than its factorization.

28150668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28150668 is about 5305.7203092511. The cubic root of 28150668 is about 304.2025859960.

The spelling of 28150668 in words is "twenty-eight million, one hundred fifty thousand, six hundred sixty-eight".