2489940 has 120 divisors (see below), whose sum is σ = 8232840. Its totient is φ = 628992.

The previous prime is 2489933. The next prime is 2489947. The reversal of 2489940 is 499842.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2489933) and next prime (2489947).

It can be written as a sum of positive squares in 4 ways, for example, as 467856 + 2022084 = 684^2 + 1422^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2489895 and 2489904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2489947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46954 + ... + 47006.

It is an arithmetic number, because the mean of its divisors is an integer number (68607).

2^2489940 is an apocalyptic number.

2489940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2489940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4116420).

2489940 is an abundant number, since it is smaller than the sum of its proper divisors (5742900).

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

2489940 is a wasteful number, since it uses less digits than its factorization.

2489940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2489940 is about 1577.9543719639. The cubic root of 2489940 is about 135.5385891553.

The spelling of 2489940 in words is "two million, four hundred eighty-nine thousand, nine hundred forty".