1238617473840 has 240 divisors, whose sum is σ = 4401555425280. Its totient is φ = 311274938880.

The previous prime is 1238617473781. The next prime is 1238617473869. The reversal of 1238617473840 is 483747168321.

1238617473840 is a `hidden beast` number, since 1 + 2 + 3 + 86 + 17 + 473 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2375859 + ... + 2849901.

It is an arithmetic number, because the mean of its divisors is an integer number (18339814272).

Almost surely, 2^{1238617473840} is an apocalyptic number.

1238617473840 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 1238617473840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2200777712640).

1238617473840 is an abundant number, since it is smaller than the sum of its proper divisors (3162937951440).

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

1238617473840 is a wasteful number, since it uses less digits than its factorization.

1238617473840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474272 (or 474263 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 1238617473840 in words is "one trillion, two hundred thirty-eight billion, six hundred seventeen million, four hundred seventy-three thousand, eight hundred forty".