2399720 has 32 divisors (see below), whose sum is σ = 5718600. Its totient is φ = 903168.

The previous prime is 2399717. The next prime is 2399753. The reversal of 2399720 is 279932.

2399720 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1737124 + 662596 = 1318^2 + 814^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1085 + ... + 2444.

2^2399720 is an apocalyptic number.

2399720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2399720 is an abundant number, since it is smaller than the sum of its proper divisors (3318880).

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

2399720 is a wasteful number, since it uses less digits than its factorization.

2399720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 2399720 is about 1549.1029662356. The cubic root of 2399720 is about 133.8813831132.

The spelling of 2399720 in words is "two million, three hundred ninety-nine thousand, seven hundred twenty".