7936040138 has 16 divisors (see below), whose sum is σ = 12832839936. Its totient is φ = 3659049840.

The previous prime is 7936040111. The next prime is 7936040173. The reversal of 7936040138 is 8310406397.

It is a junction number, because it is equal to n+sod(n) for n = 7936040095 and 7936040104.

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, 129698 + ... + 180813.

It is an arithmetic number, because the mean of its divisors is an integer number (802052496).

Almost surely, 2^7936040138 is an apocalyptic number.

7936040138 is a deficient number, since it is larger than the sum of its proper divisors (4896799798).

7936040138 is a wasteful number, since it uses less digits than its factorization.

7936040138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311509.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 7936040138 is about 89084.4550861709. The cubic root of 7936040138 is about 1994.6557436820.

The spelling of 7936040138 in words is "seven billion, nine hundred thirty-six million, forty thousand, one hundred thirty-eight".