6999740 has 24 divisors (see below), whose sum is σ = 16036272. Its totient is φ = 2545280.

The previous prime is 6999731. The next prime is 6999749. The reversal of 6999740 is 479996.

It is an interprime number because it is at equal distance from previous prime (6999731) and next prime (6999749).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 6999691 and 6999700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6999749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15689 + ... + 16128.

It is an arithmetic number, because the mean of its divisors is an integer number (668178).

Almost surely, 2^6999740 is an apocalyptic number.

It is an amenable number.

6999740 is an abundant number, since it is smaller than the sum of its proper divisors (9036532).

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

6999740 is a wasteful number, since it uses less digits than its factorization.

6999740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31837 (or 31835 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 6999740 is about 2645.7021752268. The cubic root of 6999740 is about 191.2907498569.

The spelling of 6999740 in words is "six million, nine hundred ninety-nine thousand, seven hundred forty".