2409840 has 60 divisors (see below), whose sum is σ = 8095464. Its totient is φ = 642432.

The previous prime is 2409839. The next prime is 2409859. The reversal of 2409840 is 489042.

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 954 + ... + 2393.

2^2409840 is an apocalyptic number.

2409840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2409840 is an abundant number, since it is smaller than the sum of its proper divisors (5685624).

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

2409840 is a wasteful number, since it uses less digits than its factorization.

2409840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2409840 is about 1552.3659362406. The cubic root of 2409840 is about 134.0693188538.

It can be divided in two parts, 2409 and 840, that added together give a square (3249 = 57²).

The spelling of 2409840 in words is "two million, four hundred nine thousand, eight hundred forty".