28148148 has 126 divisors (see below), whose sum is σ = 86349186. Its totient is φ = 8001504.

The previous prime is 28148137. The next prime is 28148161. The reversal of 28148148 is 84184182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28005264 + 142884 = 5292^2 + 378^2 .

It is a tau number, because it is divible by the number of its divisors (126).

It is a Harshad number since it is a multiple of its sum of digits (36).

28148148 is a modest number, since divided by 148148 gives 28 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 142786 + ... + 142982.

It is an arithmetic number, because the mean of its divisors is an integer number (685311).

Almost surely, 2^28148148 is an apocalyptic number.

28148148 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 28148148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43174593).

28148148 is an abundant number, since it is smaller than the sum of its proper divisors (58201038).

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

28148148 is a wasteful number, since it uses less digits than its factorization.

28148148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 209 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 28148148 is about 5305.4828243997. The cubic root of 28148148 is about 304.1935084921.

The spelling of 28148148 in words is "twenty-eight million, one hundred forty-eight thousand, one hundred forty-eight".