1238671980 has 432 divisors, whose sum is σ = 4871694240. Its totient is φ = 260402688.

The previous prime is 1238671961. The next prime is 1238672011. The reversal of 1238671980 is 891768321.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4471602 + ... + 4471878.

It is an arithmetic number, because the mean of its divisors is an integer number (11277070).

Almost surely, 2^1238671980 is an apocalyptic number.

1238671980 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 1238671980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2435847120).

1238671980 is an abundant number, since it is smaller than the sum of its proper divisors (3633022260).

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

1238671980 is a wasteful number, since it uses less digits than its factorization.

1238671980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1238671980 is about 35194.7720549516. The cubic root of 1238671980 is about 1073.9534014300.

The spelling of 1238671980 in words is "one billion, two hundred thirty-eight million, six hundred seventy-one thousand, nine hundred eighty".