1319505940 has 12 divisors (see below), whose sum is σ = 2770962516. Its totient is φ = 527802368.

The previous prime is 1319505923. The next prime is 1319505989. The reversal of 1319505940 is 495059131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 146991376 + 1172514564 = 12124^2 + 34242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1319505940.

It is a congruent number.

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, 32987629 + ... + 32987668.

It is an arithmetic number, because the mean of its divisors is an integer number (230913543).

Almost surely, 2^1319505940 is an apocalyptic number.

1319505940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1319505940 is an abundant number, since it is smaller than the sum of its proper divisors (1451456576).

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

1319505940 is a wasteful number, since it uses less digits than its factorization.

1319505940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65975306 (or 65975304 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1319505940 is about 36325.0043358566. The cubic root of 1319505940 is about 1096.8244336340.

The spelling of 1319505940 in words is "one billion, three hundred nineteen million, five hundred five thousand, nine hundred forty".