1959640 has 16 divisors (see below), whose sum is σ = 4409280. Its totient is φ = 783840.

The previous prime is 1959637. The next prime is 1959647. The reversal of 1959640 is 469591.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1959596 and 1959605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1959647) 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 3 ways as a sum of consecutive naturals, for example, 24456 + ... + 24535.

It is an arithmetic number, because the mean of its divisors is an integer number (275580).

2^1959640 is an apocalyptic number.

1959640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1959640 is an abundant number, since it is smaller than the sum of its proper divisors (2449640).

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

1959640 is a wasteful number, since it uses less digits than its factorization.

1959640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49002 (or 48998 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1959640 is about 1399.8714226671. The cubic root of 1959640 is about 125.1388324141.

The spelling of 1959640 in words is "one million, nine hundred fifty-nine thousand, six hundred forty".