1308609940 has 48 divisors (see below), whose sum is σ = 3019544640. Its totient is φ = 472423680.

The previous prime is 1308609937. The next prime is 1308609943. The reversal of 1308609940 is 499068031.

It is an interprime number because it is at equal distance from previous prime (1308609937) and next prime (1308609943).

It is a junction number, because it is equal to n+sod(n) for n = 1308609893 and 1308609902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308609943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9184 + ... + 51976.

It is an arithmetic number, because the mean of its divisors is an integer number (62907180).

Almost surely, 2^1308609940 is an apocalyptic number.

1308609940 is a gapful number since it is divisible by the number (10) 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 1308609940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509772320).

1308609940 is an abundant number, since it is smaller than the sum of its proper divisors (1710934700).

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

1308609940 is a wasteful number, since it uses less digits than its factorization.

1308609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42952 (or 42950 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 1308609940 is about 36174.7140970043. The cubic root of 1308609940 is about 1093.7970261577.

The spelling of 1308609940 in words is "one billion, three hundred eight million, six hundred nine thousand, nine hundred forty".