1930640 has 20 divisors (see below), whose sum is σ = 4488924. Its totient is φ = 772224.

The previous prime is 1930633. The next prime is 1930667. The reversal of 1930640 is 460391.

It can be written as a sum of positive squares in 2 ways, for example, as 781456 + 1149184 = 884^2 + 1072^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 11987 + ... + 12146.

2^1930640 is an apocalyptic number.

1930640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1930640 is an abundant number, since it is smaller than the sum of its proper divisors (2558284).

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

1930640 is a wasteful number, since it uses less digits than its factorization.

1930640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24146 (or 24140 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1930640 is about 1389.4747208928. The cubic root of 1930640 is about 124.5184673928.

The spelling of 1930640 in words is "one million, nine hundred thirty thousand, six hundred forty".