19440830 has 16 divisors (see below), whose sum is σ = 35322480. Its totient is φ = 7703232.

The previous prime is 19440829. The next prime is 19440851. The reversal of 19440830 is 3804491.

It is a junction number, because it is equal to n+sod(n) for n = 19440793 and 19440802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8015 + ... + 10154.

It is an arithmetic number, because the mean of its divisors is an integer number (2207655).

Almost surely, 2^19440830 is an apocalyptic number.

19440830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19440830 is a deficient number, since it is larger than the sum of its proper divisors (15881650).

19440830 is a wasteful number, since it uses less digits than its factorization.

19440830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18283.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 19440830 is about 4409.1756599165. The cubic root of 19440830 is about 268.8881114529. Note that the first 3 decimals are identical.

The spelling of 19440830 in words is "nineteen million, four hundred forty thousand, eight hundred thirty".