1306325640 has 32 divisors (see below), whose sum is σ = 3918977280. Its totient is φ = 348353472.

The previous prime is 1306325633. The next prime is 1306325653. The reversal of 1306325640 is 465236031.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1306325598 and 1306325607.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5442904 + ... + 5443143.

It is an arithmetic number, because the mean of its divisors is an integer number (122468040).

Almost surely, 2^1306325640 is an apocalyptic number.

1306325640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1306325640 is an abundant number, since it is smaller than the sum of its proper divisors (2612651640).

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

1306325640 is a wasteful number, since it uses less digits than its factorization.

1306325640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886061 (or 10886057 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 1306325640 is about 36143.1271474951. The cubic root of 1306325640 is about 1093.1602140960.

The spelling of 1306325640 in words is "one billion, three hundred six million, three hundred twenty-five thousand, six hundred forty".