4397440 has 32 divisors (see below), whose sum is σ = 10514160. Its totient is φ = 1758720.

The previous prime is 4397431. The next prime is 4397453. The reversal of 4397440 is 447934.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2796 + ... + 4075.

Almost surely, 2^4397440 is an apocalyptic number.

4397440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4397440 is an abundant number, since it is smaller than the sum of its proper divisors (6116720).

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

4397440 is an equidigital number, since it uses as much as digits as its factorization.

4397440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890 (or 6878 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 4397440 is about 2097.0073914987. The cubic root of 4397440 is about 163.8324682207.

Subtracting from 4397440 its sum of digits (31), we obtain a square (4397409 = 2097²).

The spelling of 4397440 in words is "four million, three hundred ninety-seven thousand, four hundred forty".