6918233840 has 40 divisors (see below), whose sum is σ = 18382737120. Its totient is φ = 2371965696.

The previous prime is 6918233831. The next prime is 6918233869. The reversal of 6918233840 is 483328196.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×6918233840² = 95723918929842291200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6918233791 and 6918233800.

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, 6176435 + ... + 6177554.

It is an arithmetic number, because the mean of its divisors is an integer number (459568428).

Almost surely, 2^6918233840 is an apocalyptic number.

It is an amenable number.

6918233840 is an abundant number, since it is smaller than the sum of its proper divisors (11464503280).

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

6918233840 is a wasteful number, since it uses less digits than its factorization.

6918233840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12354009 (or 12354003 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 6918233840 is about 83175.9210348764. The cubic root of 6918233840 is about 1905.4537525678.

The spelling of 6918233840 in words is "six billion, nine hundred eighteen million, two hundred thirty-three thousand, eight hundred forty".