1243010807838 has 96 divisors (see below), whose sum is σ = 2899762474752. Its totient is φ = 383385830400.

The previous prime is 1243010807837. The next prime is 1243010807881. The reversal of 1243010807838 is 8387080103421.

1243010807838 is a `hidden beast` number, since 12 + 430 + 108 + 0 + 78 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1243010807793 and 1243010807802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243010807837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41442195 + ... + 41472177.

It is an arithmetic number, because the mean of its divisors is an integer number (30205859112).

Almost surely, 2^{1243010807838} is an apocalyptic number.

1243010807838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243010807838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1449881237376).

1243010807838 is an abundant number, since it is smaller than the sum of its proper divisors (1656751666914).

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

1243010807838 is a wasteful number, since it uses less digits than its factorization.

1243010807838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32290 (or 32287 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 1243010807838 in words is "one trillion, two hundred forty-three billion, ten million, eight hundred seven thousand, eight hundred thirty-eight".