6999140 has 24 divisors (see below), whose sum is σ = 14941752. Its totient is φ = 2753280.

The previous prime is 6999131. The next prime is 6999143. The reversal of 6999140 is 419996.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 6280036 = 848^2 + 2506^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6999094 and 6999103.

It is not an unprimeable number, because it can be changed into a prime (6999143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1649 + ... + 4088.

It is an arithmetic number, because the mean of its divisors is an integer number (622573).

Almost surely, 2^6999140 is an apocalyptic number.

It is an amenable number.

6999140 is an abundant number, since it is smaller than the sum of its proper divisors (7942612).

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

6999140 is a wasteful number, since it uses less digits than its factorization.

6999140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807 (or 5805 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 6999140 is about 2645.5887813491. The cubic root of 6999140 is about 191.2852840477.

The spelling of 6999140 in words is "six million, nine hundred ninety-nine thousand, one hundred forty".