1928140 has 48 divisors (see below), whose sum is σ = 4408992. Its totient is φ = 705536.

The previous prime is 1928099. The next prime is 1928141. The reversal of 1928140 is 418291.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1928141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17967 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (91854).

2^1928140 is an apocalyptic number.

1928140 is a gapful number since it is divisible by the number (10) 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 1928140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204496).

1928140 is an abundant number, since it is smaller than the sum of its proper divisors (2480852).

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

1928140 is a wasteful number, since it uses less digits than its factorization.

1928140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1928140 is about 1388.5748089318. The cubic root of 1928140 is about 124.4646975493.

It can be divided in two parts, 19281 and 40, that added together give a square (19321 = 139²).

The spelling of 1928140 in words is "one million, nine hundred twenty-eight thousand, one hundred forty".