1209838080 has 160 divisors (see below), whose sum is σ = 4219604928. Its totient is φ = 293273600.

The previous prime is 1209838073. The next prime is 1209838081. The reversal of 1209838080 is 808389021.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1209838081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77320 + ... + 91640.

Almost surely, 2^1209838080 is an apocalyptic number.

1209838080 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 1209838080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109802464).

1209838080 is an abundant number, since it is smaller than the sum of its proper divisors (3009766848).

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

1209838080 is a wasteful number, since it uses less digits than its factorization.

1209838080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14358 (or 14342 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 1209838080 is about 34782.7267476258. The cubic root of 1209838080 is about 1065.5547023283.

The spelling of 1209838080 in words is "one billion, two hundred nine million, eight hundred thirty-eight thousand, eighty".