19440434 has 16 divisors (see below), whose sum is σ = 31534272. Its totient is φ = 8935248.

The previous prime is 19440431. The next prime is 19440457. The reversal of 19440434 is 43404491.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19440397 and 19440406.

It is not an unprimeable number, because it can be changed into a prime (19440431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5417 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (1970892).

Almost surely, 2^19440434 is an apocalyptic number.

19440434 is a deficient number, since it is larger than the sum of its proper divisors (12093838).

19440434 is a wasteful number, since it uses less digits than its factorization.

19440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 19440434 is about 4409.1307533345. The cubic root of 19440434 is about 268.8862857350.

The spelling of 19440434 in words is "nineteen million, four hundred forty thousand, four hundred thirty-four".