7909216340 has 24 divisors (see below), whose sum is σ = 17586375912. Its totient is φ = 2977587200.

The previous prime is 7909216331. The next prime is 7909216409. The reversal of 7909216340 is 436129097.

It can be written as a sum of positive squares in 4 ways, for example, as 235806736 + 7673409604 = 15356^2 + 87598^2 .

It is a super-2 number, since 2×7909216340² (a number of 21 digits) contains 22 as substring.

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, 11630861 + ... + 11631540.

It is an arithmetic number, because the mean of its divisors is an integer number (732765663).

Almost surely, 2^7909216340 is an apocalyptic number.

It is an amenable number.

7909216340 is an abundant number, since it is smaller than the sum of its proper divisors (9677159572).

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

7909216340 is a wasteful number, since it uses less digits than its factorization.

7909216340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23262427 (or 23262425 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 7909216340 is about 88933.7750238907. The cubic root of 7909216340 is about 1992.4058962907.

The spelling of 7909216340 in words is "seven billion, nine hundred nine million, two hundred sixteen thousand, three hundred forty".