1238195280 has 160 divisors (see below), whose sum is σ = 4399718400. Its totient is φ = 282180096.

The previous prime is 1238195279. The next prime is 1238195293. The reversal of 1238195280 is 825918321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703041 + ... + 704799.

It is an arithmetic number, because the mean of its divisors is an integer number (27498240).

Almost surely, 2^1238195280 is an apocalyptic number.

1238195280 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 1238195280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199859200).

1238195280 is an abundant number, since it is smaller than the sum of its proper divisors (3161523120).

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

1238195280 is a wasteful number, since it uses less digits than its factorization.

1238195280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2195 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 1238195280 is about 35187.9990905991. Note that the first 3 decimals coincide. The cubic root of 1238195280 is about 1073.8156142721.

The spelling of 1238195280 in words is "one billion, two hundred thirty-eight million, one hundred ninety-five thousand, two hundred eighty".