2684440 has 32 divisors (see below), whose sum is σ = 6590160. Its totient is φ = 976000.

The previous prime is 2684431. The next prime is 2684449. The reversal of 2684440 is 444862.

It is an interprime number because it is at equal distance from previous prime (2684431) and next prime (2684449).

It is a super-2 number, since 2×2684440² = 14412436227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2684399 and 2684408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684449) 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, 2611 + ... + 3490.

2^2684440 is an apocalyptic number.

2684440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2684440 is an abundant number, since it is smaller than the sum of its proper divisors (3905720).

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

2684440 is a wasteful number, since it uses less digits than its factorization.

2684440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6123 (or 6119 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 2684440 is about 1638.4260740113. The cubic root of 2684440 is about 138.9796564607.

The spelling of 2684440 in words is "two million, six hundred eighty-four thousand, four hundred forty".