7933785138 has 32 divisors (see below), whose sum is σ = 17729150400. Its totient is φ = 2629817568.

The previous prime is 7933785121. The next prime is 7933785151. The reversal of 7933785138 is 8315873397.

7933785138 is a `hidden beast` number, since 7 + 93 + 37 + 8 + 513 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400731 + ... + 420062.

It is an arithmetic number, because the mean of its divisors is an integer number (554035950).

Almost surely, 2^7933785138 is an apocalyptic number.

7933785138 is an abundant number, since it is smaller than the sum of its proper divisors (9795365262).

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

7933785138 is a wasteful number, since it uses less digits than its factorization.

7933785138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820983 (or 820977 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 7933785138 is about 89071.7976578445. The cubic root of 7933785138 is about 1994.4668008038.

The spelling of 7933785138 in words is "seven billion, nine hundred thirty-three million, seven hundred eighty-five thousand, one hundred thirty-eight".