6994440 has 48 divisors (see below), whose sum is σ = 22733100. Its totient is φ = 1865088.

The previous prime is 6994433. The next prime is 6994447. The reversal of 6994440 is 444996.

It is an interprime number because it is at equal distance from previous prime (6994433) and next prime (6994447).

It can be written as a sum of positive squares in 2 ways, for example, as 5788836 + 1205604 = 2406^2 + 1098^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6994395 and 6994404.

It is not an unprimeable number, because it can be changed into a prime (6994447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9355 + ... + 10074.

Almost surely, 2^6994440 is an apocalyptic number.

6994440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6994440 is an abundant number, since it is smaller than the sum of its proper divisors (15738660).

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

6994440 is a wasteful number, since it uses less digits than its factorization.

6994440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19446 (or 19439 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6994440 is about 2644.7003610995. The cubic root of 6994440 is about 191.2424577315.

The spelling of 6994440 in words is "six million, nine hundred ninety-four thousand, four hundred forty".