1308528681 has 8 divisors (see below), whose sum is σ = 1745237760. Its totient is φ = 872086032.

The previous prime is 1308528659. The next prime is 1308528701. The reversal of 1308528681 is 1868258031.

1308528681 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1308528681 - 2⁷ = 1308528553 is a prime.

It is a super-2 number, since 2×1308528681² = 3424494617999199522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1308529681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54850 + ... + 75003.

It is an arithmetic number, because the mean of its divisors is an integer number (218154720).

Almost surely, 2^1308528681 is an apocalyptic number.

It is an amenable number.

1308528681 is a deficient number, since it is larger than the sum of its proper divisors (436709079).

1308528681 is a wasteful number, since it uses less digits than its factorization.

1308528681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133215.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 1308528681 is about 36173.5909331656. The cubic root of 1308528681 is about 1093.7743856724.

The spelling of 1308528681 in words is "one billion, three hundred eight million, five hundred twenty-eight thousand, six hundred eighty-one".