28371552 has 96 divisors (see below), whose sum is σ = 82664064. Its totient is φ = 8448000.

The previous prime is 28371533. The next prime is 28371557. The reversal of 28371552 is 25517382.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371557) 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 15 ways as a sum of consecutive naturals, for example, 70552 + ... + 70952.

It is an arithmetic number, because the mean of its divisors is an integer number (861084).

Almost surely, 2^28371552 is an apocalyptic number.

28371552 is a gapful number since it is divisible by the number (22) 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 28371552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41332032).

28371552 is an abundant number, since it is smaller than the sum of its proper divisors (54292512).

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

28371552 is a wasteful number, since it uses less digits than its factorization.

28371552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 484 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 28371552 is about 5326.4952830168. The cubic root of 28371552 is about 304.9961551070.

The spelling of 28371552 in words is "twenty-eight million, three hundred seventy-one thousand, five hundred fifty-two".