10440399 has 4 divisors (see below), whose sum is σ = 13920536. Its totient is φ = 6960264.

The previous prime is 10440383. The next prime is 10440427. The reversal of 10440399 is 99304401.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 10440399 - 2⁴ = 10440383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10440349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740064 + ... + 1740069.

It is an arithmetic number, because the mean of its divisors is an integer number (3480134).

Almost surely, 2^10440399 is an apocalyptic number.

10440399 is a deficient number, since it is larger than the sum of its proper divisors (3480137).

10440399 is an equidigital number, since it uses as much as digits as its factorization.

10440399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480136.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 10440399 is about 3231.1606273907. The cubic root of 10440399 is about 218.5608472081.

The spelling of 10440399 in words is "ten million, four hundred forty thousand, three hundred ninety-nine".