1308989772 has 18 divisors (see below), whose sum is σ = 3308835348. Its totient is φ = 436329912.

The previous prime is 1308989767. The next prime is 1308989807. The reversal of 1308989772 is 2779898031.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1308989772² = 3426908446401223968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18180378 + ... + 18180449.

It is an arithmetic number, because the mean of its divisors is an integer number (183824186).

Almost surely, 2^1308989772 is an apocalyptic number.

1308989772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1308989772 is an abundant number, since it is smaller than the sum of its proper divisors (1999845576).

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

1308989772 is a wasteful number, since it uses less digits than its factorization.

1308989772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36360837 (or 36360832 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 1308989772 is about 36179.9636815738. The cubic root of 1308989772 is about 1093.9028430018.

The spelling of 1308989772 in words is "one billion, three hundred eight million, nine hundred eighty-nine thousand, seven hundred seventy-two".