1968380440 has 32 divisors (see below), whose sum is σ = 4769538480. Its totient is φ = 726786432.

The previous prime is 1968380429. The next prime is 1968380473. The reversal of 1968380440 is 440838691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892154 + ... + 1893193.

Almost surely, 2^1968380440 is an apocalyptic number.

1968380440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1968380440 is an abundant number, since it is smaller than the sum of its proper divisors (2801158040).

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

1968380440 is a wasteful number, since it uses less digits than its factorization.

1968380440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785371 (or 3785367 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1968380440 is about 44366.4337083791. The cubic root of 1968380440 is about 1253.2460570608.

The spelling of 1968380440 in words is "one billion, nine hundred sixty-eight million, three hundred eighty thousand, four hundred forty".