2399400 has 144 divisors (see below), whose sum is σ = 8511360. Its totient is φ = 604800.

The previous prime is 2399399. The next prime is 2399407. The reversal of 2399400 is 49932.

It is a Cunningham number, because it is equal to 1549²-1.

It is not an unprimeable number, because it can be changed into a prime (2399407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55779 + ... + 55821.

2^2399400 is an apocalyptic number.

2399400 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 2399400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4255680).

2399400 is an abundant number, since it is smaller than the sum of its proper divisors (6111960).

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

2399400 is a wasteful number, since it uses less digits than its factorization.

2399400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2399400 is about 1548.9996772111. Note that the first 3 decimals coincide. The cubic root of 2399400 is about 133.8754318707.

The spelling of 2399400 in words is "two million, three hundred ninety-nine thousand, four hundred".