28899378 has 48 divisors (see below), whose sum is σ = 65684736. Its totient is φ = 9171360.

The previous prime is 28899373. The next prime is 28899379. The reversal of 28899378 is 87399882.

It is not an unprimeable number, because it can be changed into a prime (28899373) 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, 37000 + ... + 37772.

It is an arithmetic number, because the mean of its divisors is an integer number (1368432).

Almost surely, 2^28899378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28899378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32842368).

28899378 is an abundant number, since it is smaller than the sum of its proper divisors (36785358).

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

28899378 is a wasteful number, since it uses less digits than its factorization.

28899378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 876 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 28899378 is about 5375.8141708954. The cubic root of 28899378 is about 306.8759344065.

The spelling of 28899378 in words is "twenty-eight million, eight hundred ninety-nine thousand, three hundred seventy-eight".