1308856989 has 32 divisors (see below), whose sum is σ = 1923102720. Its totient is φ = 785246400.

The previous prime is 1308856973. The next prime is 1308856999. The reversal of 1308856989 is 9896588031.

It is not a de Polignac number, because 1308856989 - 2⁴ = 1308856973 is a prime.

It is a super-2 number, since 2×1308856989² = 3426213235308292242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308856949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2419059 + ... + 2419599.

It is an arithmetic number, because the mean of its divisors is an integer number (60096960).

Almost surely, 2^1308856989 is an apocalyptic number.

It is an amenable number.

1308856989 is a deficient number, since it is larger than the sum of its proper divisors (614245731).

1308856989 is a wasteful number, since it uses less digits than its factorization.

1308856989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The square root of 1308856989 is about 36178.1286000257. The cubic root of 1308856989 is about 1093.8658535065.

The spelling of 1308856989 in words is "one billion, three hundred eight million, eight hundred fifty-six thousand, nine hundred eighty-nine".