7961438306 has 8 divisors (see below), whose sum is σ = 11942775660. Its totient is φ = 3980513088.

The previous prime is 7961438257. The next prime is 7961438323. The reversal of 7961438306 is 6038341697.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7757205625 + 204232681 = 88075^2 + 14291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×7961438306³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49091 + ... + 135398.

Almost surely, 2^7961438306 is an apocalyptic number.

7961438306 is a deficient number, since it is larger than the sum of its proper divisors (3981337354).

7961438306 is a wasteful number, since it uses less digits than its factorization.

7961438306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206068.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 7961438306 is about 89226.8922802985. The cubic root of 7961438306 is about 1996.7813484197.

The spelling of 7961438306 in words is "seven billion, nine hundred sixty-one million, four hundred thirty-eight thousand, three hundred six".