28371648 has 28 divisors (see below), whose sum is σ = 75067160. Its totient is φ = 9457152.

The previous prime is 28371647. The next prime is 28371677. The reversal of 28371648 is 84617382.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28371647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73693 + ... + 74076.

It is an arithmetic number, because the mean of its divisors is an integer number (2680970).

Almost surely, 2^28371648 is an apocalyptic number.

It is an amenable number.

28371648 is an abundant number, since it is smaller than the sum of its proper divisors (46695512).

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

28371648 is a wasteful number, since it uses less digits than its factorization.

28371648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147784 (or 147774 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 28371648 is about 5326.5042945632. The cubic root of 28371648 is about 304.9964991088.

The spelling of 28371648 in words is "twenty-eight million, three hundred seventy-one thousand, six hundred forty-eight".