2409990 has 64 divisors (see below), whose sum is σ = 6462720. Its totient is φ = 570240.

The previous prime is 2409983. The next prime is 2409997. The reversal of 2409990 is 999042.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2409983) and next prime (2409997).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2409997) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22056 + ... + 22164.

It is an arithmetic number, because the mean of its divisors is an integer number (100980).

2^2409990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2409990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3231360).

2409990 is an abundant number, since it is smaller than the sum of its proper divisors (4052730).

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

2409990 is a wasteful number, since it uses less digits than its factorization.

2409990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2409990 is about 1552.4142488395. The cubic root of 2409990 is about 134.0721005019.

The spelling of 2409990 in words is "two million, four hundred nine thousand, nine hundred ninety".