1308881100 has 72 divisors (see below), whose sum is σ = 3792413520. Its totient is φ = 348538880.

The previous prime is 1308881069. The next prime is 1308881107. The reversal of 1308881100 is 11888031.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1308881107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240004 + ... + 245396.

It is an arithmetic number, because the mean of its divisors is an integer number (52672410).

Almost surely, 2^1308881100 is an apocalyptic number.

1308881100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1308881100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896206760).

1308881100 is an abundant number, since it is smaller than the sum of its proper divisors (2483532420).

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

1308881100 is a wasteful number, since it uses less digits than its factorization.

1308881100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219 (or 6212 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 1308881100 is about 36178.4618246824. The cubic root of 1308881100 is about 1093.8725703182.

The spelling of 1308881100 in words is "one billion, three hundred eight million, eight hundred eighty-one thousand, one hundred".