28871948 has 12 divisors (see below), whose sum is σ = 57743952. Its totient is φ = 12373680.

The previous prime is 28871939. The next prime is 28871957. The reversal of 28871948 is 84917882.

It is an interprime number because it is at equal distance from previous prime (28871939) and next prime (28871957).

28871948 is an admirable number.

It is an unprimeable number.

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, 515543 + ... + 515598.

It is an arithmetic number, because the mean of its divisors is an integer number (4811996).

Almost surely, 2^28871948 is an apocalyptic number.

28871948 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28871948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28871948 is a wasteful number, since it uses less digits than its factorization.

28871948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031152 (or 1031150 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 28871948 is about 5373.2623237657. The cubic root of 28871948 is about 306.7788126911.

The spelling of 28871948 in words is "twenty-eight million, eight hundred seventy-one thousand, nine hundred forty-eight".