28148274 has 96 divisors (see below), whose sum is σ = 79432704. Its totient is φ = 6985440.

The previous prime is 28148261. The next prime is 28148303. The reversal of 28148274 is 47284182.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 31437 + ... + 32319.

It is an arithmetic number, because the mean of its divisors is an integer number (827424).

Almost surely, 2^28148274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28148274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39716352).

28148274 is an abundant number, since it is smaller than the sum of its proper divisors (51284430).

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

28148274 is a wasteful number, since it uses less digits than its factorization.

28148274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 929 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28148274 is about 5305.4946988947. The cubic root of 28148274 is about 304.1939623802.

The spelling of 28148274 in words is "twenty-eight million, one hundred forty-eight thousand, two hundred seventy-four".