28745948 has 72 divisors (see below), whose sum is σ = 65116800. Its totient is φ = 10977120.

The previous prime is 28745939. The next prime is 28745953. The reversal of 28745948 is 84954782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 144353 + ... + 144551.

It is an arithmetic number, because the mean of its divisors is an integer number (904400).

Almost surely, 2^28745948 is an apocalyptic number.

28745948 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 28745948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32558400).

28745948 is an abundant number, since it is smaller than the sum of its proper divisors (36370852).

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

28745948 is a wasteful number, since it uses less digits than its factorization.

28745948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 286 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 28745948 is about 5361.5247831191. The cubic root of 28745948 is about 306.3318910256.

The spelling of 28745948 in words is "twenty-eight million, seven hundred forty-five thousand, nine hundred forty-eight".