1309377488 has 80 divisors (see below), whose sum is σ = 2699934336. Its totient is φ = 613916160.

The previous prime is 1309377481. The next prime is 1309377491. The reversal of 1309377488 is 8847739031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309377481) 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 15 ways as a sum of consecutive naturals, for example, 7568570 + ... + 7568742.

Almost surely, 2^1309377488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1309377488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349967168).

1309377488 is an abundant number, since it is smaller than the sum of its proper divisors (1390556848).

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

1309377488 is a wasteful number, since it uses less digits than its factorization.

1309377488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1309377488 is about 36185.3214439225. The cubic root of 1309377488 is about 1094.0108351283.

The spelling of 1309377488 in words is "one billion, three hundred nine million, three hundred seventy-seven thousand, four hundred eighty-eight".