1928388 has 48 divisors (see below), whose sum is σ = 5612544. Its totient is φ = 500640.

The previous prime is 1928387. The next prime is 1928401. The reversal of 1928388 is 8838291.

It is not an unprimeable number, because it can be changed into a prime (1928383) 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, 120 + ... + 1967.

It is an arithmetic number, because the mean of its divisors is an integer number (116928).

2^1928388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1928388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2806272).

1928388 is an abundant number, since it is smaller than the sum of its proper divisors (3684156).

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

1928388 is a wasteful number, since it uses less digits than its factorization.

1928388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2110 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 1928388 is about 1388.6641062546. The cubic root of 1928388 is about 124.4700335936.

Subtracting 1928388 from its reverse (8838291), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1928388 in words is "one million, nine hundred twenty-eight thousand, three hundred eighty-eight".