1319929668 has 60 divisors (see below), whose sum is σ = 3458433132. Its totient is φ = 438972480.

The previous prime is 1319929631. The next prime is 1319929673. The reversal of 1319929668 is 8669299131.

It can be written as a sum of positive squares in 2 ways, for example, as 1021953024 + 297976644 = 31968^2 + 17262^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 144946 + ... + 153782.

Almost surely, 2^1319929668 is an apocalyptic number.

1319929668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1319929668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729216566).

1319929668 is an abundant number, since it is smaller than the sum of its proper divisors (2138503464).

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

1319929668 is a wasteful number, since it uses less digits than its factorization.

1319929668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314 (or 9303 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 1319929668 is about 36330.8363239824. The cubic root of 1319929668 is about 1096.9418274428.

The spelling of 1319929668 in words is "one billion, three hundred nineteen million, nine hundred twenty-nine thousand, six hundred sixty-eight".