1309408898 has 24 divisors (see below), whose sum is σ = 2254270656. Its totient is φ = 558792360.

The previous prime is 1309408897. The next prime is 1309408931. The reversal of 1309408898 is 8988049031.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1309408897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1353611 + ... + 1354577.

It is an arithmetic number, because the mean of its divisors is an integer number (93927944).

Almost surely, 2^1309408898 is an apocalyptic number.

1309408898 is a deficient number, since it is larger than the sum of its proper divisors (944861758).

1309408898 is an frugal number, since it uses more digits than its factorization.

1309408898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 1309408898 is about 36185.7554570856. The cubic root of 1309408898 is about 1094.0195829508.

The spelling of 1309408898 in words is "one billion, three hundred nine million, four hundred eight thousand, eight hundred ninety-eight".