6940538880 has 768 divisors, whose sum is σ = 27172454400. Its totient is φ = 1492254720.

The previous prime is 6940538849. The next prime is 6940538893. The reversal of 6940538880 is 888350496.

It is a tau number, because it is divible by the number of its divisors (768).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147671017 + ... + 147671063.

It is an arithmetic number, because the mean of its divisors is an integer number (35380800).

Almost surely, 2^6940538880 is an apocalyptic number.

6940538880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6940538880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13586227200).

6940538880 is an abundant number, since it is smaller than the sum of its proper divisors (20231915520).

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

6940538880 is a wasteful number, since it uses less digits than its factorization.

6940538880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 6940538880 is about 83309.8966509982. The cubic root of 6940538880 is about 1907.4993434321.

The spelling of 6940538880 in words is "six billion, nine hundred forty million, five hundred thirty-eight thousand, eight hundred eighty".