6940250640 has 160 divisors (see below), whose sum is σ = 23962573440. Its totient is φ = 1846301184.

The previous prime is 6940250627. The next prime is 6940250641. The reversal of 6940250640 is 460520496.

6940250640 is a `hidden beast` number, since 6 + 9 + 4 + 0 + 2 + 5 + 0 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6940250595 and 6940250604.

It is not an unprimeable number, because it can be changed into a prime (6940250641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 953254 + ... + 960506.

It is an arithmetic number, because the mean of its divisors is an integer number (149766084).

Almost surely, 2^6940250640 is an apocalyptic number.

6940250640 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 6940250640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11981286720).

6940250640 is an abundant number, since it is smaller than the sum of its proper divisors (17022322800).

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

6940250640 is a wasteful number, since it uses less digits than its factorization.

6940250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 6940250640 is about 83308.1667065120. The cubic root of 6940250640 is about 1907.4729369704.

The spelling of 6940250640 in words is "six billion, nine hundred forty million, two hundred fifty thousand, six hundred forty".