2249840 has 20 divisors (see below), whose sum is σ = 5231064. Its totient is φ = 899904.

The previous prime is 2249827. The next prime is 2249861. The reversal of 2249840 is 489422.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13982 + ... + 14141.

2^2249840 is an apocalyptic number.

2249840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2249840 is an abundant number, since it is smaller than the sum of its proper divisors (2981224).

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

2249840 is a wasteful number, since it uses less digits than its factorization.

2249840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28136 (or 28130 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2249840 is about 1499.9466657185. The cubic root of 2249840 is about 131.0339635729.

The spelling of 2249840 in words is "two million, two hundred forty-nine thousand, eight hundred forty".