1308867885 has 24 divisors (see below), whose sum is σ = 2443221144. Its totient is φ = 644365440.

The previous prime is 1308867853. The next prime is 1308867929. The reversal of 1308867885 is 5887688031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26440164 + 1282427721 = 5142^2 + 35811^2 .

It is not a de Polignac number, because 1308867885 - 2⁵ = 1308867853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1118106 + ... + 1119275.

It is an arithmetic number, because the mean of its divisors is an integer number (101800881).

Almost surely, 2^1308867885 is an apocalyptic number.

1308867885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1308867885 is a deficient number, since it is larger than the sum of its proper divisors (1134353259).

1308867885 is a wasteful number, since it uses less digits than its factorization.

1308867885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237405 (or 2237402 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The square root of 1308867885 is about 36178.2791879326. The cubic root of 1308867885 is about 1093.8688889105.

The spelling of 1308867885 in words is "one billion, three hundred eight million, eight hundred sixty-seven thousand, eight hundred eighty-five".