19440705 has 16 divisors (see below), whose sum is σ = 32742720. Its totient is φ = 9822528.

The previous prime is 19440661. The next prime is 19440721. The reversal of 19440705 is 50704491.

It is a happy number.

It is not a de Polignac number, because 19440705 - 2¹⁵ = 19407937 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33822 + ... + 34391.

It is an arithmetic number, because the mean of its divisors is an integer number (2046420).

Almost surely, 2^19440705 is an apocalyptic number.

19440705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19440705 is a deficient number, since it is larger than the sum of its proper divisors (13302015).

19440705 is a wasteful number, since it uses less digits than its factorization.

19440705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68240.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 19440705 is about 4409.1614849084. The cubic root of 19440705 is about 268.8875351557.

The spelling of 19440705 in words is "nineteen million, four hundred forty thousand, seven hundred five".