7812040338 has 24 divisors (see below), whose sum is σ = 16941962700. Its totient is φ = 2601571104.

The previous prime is 7812040297. The next prime is 7812040343. The reversal of 7812040338 is 8330402187.

It can be written as a sum of positive squares in 2 ways, for example, as 7569522009 + 242518329 = 87003^2 + 15573^2 .

It is a super-2 number, since 2×7812040338² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183753 + ... + 222236.

Almost surely, 2^7812040338 is an apocalyptic number.

7812040338 is an abundant number, since it is smaller than the sum of its proper divisors (9129922362).

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

7812040338 is a wasteful number, since it uses less digits than its factorization.

7812040338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407066 (or 407063 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 7812040338 is about 88385.7473691319. The cubic root of 7812040338 is about 1984.2123985734.

The spelling of 7812040338 in words is "seven billion, eight hundred twelve million, forty thousand, three hundred thirty-eight".