1308632740 has 12 divisors (see below), whose sum is σ = 2748128796. Its totient is φ = 523453088.

The previous prime is 1308632707. The next prime is 1308632849. The reversal of 1308632740 is 472368031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 419758144 + 888874596 = 20488^2 + 29814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1308632696 and 1308632705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32715799 + ... + 32715838.

It is an arithmetic number, because the mean of its divisors is an integer number (229010733).

Almost surely, 2^1308632740 is an apocalyptic number.

1308632740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1308632740 is an abundant number, since it is smaller than the sum of its proper divisors (1439496056).

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

1308632740 is a wasteful number, since it uses less digits than its factorization.

1308632740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65431646 (or 65431644 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1308632740 is about 36175.0292328838. The cubic root of 1308632740 is about 1093.8033785541.

The spelling of 1308632740 in words is "one billion, three hundred eight million, six hundred thirty-two thousand, seven hundred forty".