1928840 has 16 divisors (see below), whose sum is σ = 4339980. Its totient is φ = 771520.

The previous prime is 1928831. The next prime is 1928869. The reversal of 1928840 is 488291.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1684804 + 244036 = 1298^2 + 494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1928797 and 1928806.

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 3 ways as a sum of consecutive naturals, for example, 24071 + ... + 24150.

2^1928840 is an apocalyptic number.

1928840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1928840 is an abundant number, since it is smaller than the sum of its proper divisors (2411140).

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

1928840 is a wasteful number, since it uses less digits than its factorization.

1928840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48232 (or 48228 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1928840 is about 1388.8268430586. The cubic root of 1928840 is about 124.4797577882.

The spelling of 1928840 in words is "one million, nine hundred twenty-eight thousand, eight hundred forty".