28331548 has 24 divisors (see below), whose sum is σ = 57304800. Its totient is φ = 12004608.

The previous prime is 28331543. The next prime is 28331549. The reversal of 28331548 is 84513382.

It is a happy number.

It is a super-2 number, since 2×28331548² = 1605353224152608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331543) 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 7 ways as a sum of consecutive naturals, for example, 3193 + ... + 8176.

It is an arithmetic number, because the mean of its divisors is an integer number (2387700).

Almost surely, 2^28331548 is an apocalyptic number.

28331548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28331548 is an abundant number, since it is smaller than the sum of its proper divisors (28973252).

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

28331548 is a wasteful number, since it uses less digits than its factorization.

28331548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11469 (or 11467 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28331548 is about 5322.7387687167. The cubic root of 28331548 is about 304.8527390870.

The spelling of 28331548 in words is "twenty-eight million, three hundred thirty-one thousand, five hundred forty-eight".