7938121236 has 24 divisors (see below), whose sum is σ = 19611829440. Its totient is φ = 2490390912.

The previous prime is 7938121199. The next prime is 7938121241. The reversal of 7938121236 is 6321218397.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19455976 + ... + 19456383.

It is an arithmetic number, because the mean of its divisors is an integer number (817159560).

Almost surely, 2^7938121236 is an apocalyptic number.

It is an amenable number.

7938121236 is an abundant number, since it is smaller than the sum of its proper divisors (11673708204).

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

7938121236 is a wasteful number, since it uses less digits than its factorization.

7938121236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38912383 (or 38912381 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 7938121236 is about 89096.1347983177. The cubic root of 7938121236 is about 1994.8300838319.

The spelling of 7938121236 in words is "seven billion, nine hundred thirty-eight million, one hundred twenty-one thousand, two hundred thirty-six".