19044040 has 16 divisors (see below), whose sum is σ = 42849180. Its totient is φ = 7617600.

The previous prime is 19044019. The next prime is 19044043. The reversal of 19044040 is 4044091.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17156164 + 1887876 = 4142^2 + 1374^2 .

It is not an unprimeable number, because it can be changed into a prime (19044043) 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, 238011 + ... + 238090.

Almost surely, 2^19044040 is an apocalyptic number.

19044040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19044040 is an abundant number, since it is smaller than the sum of its proper divisors (23805140).

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

19044040 is a wasteful number, since it uses less digits than its factorization.

19044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476112 (or 476108 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 19044040 is about 4363.9477540411. The cubic root of 19044040 is about 267.0461749221.

It can be divided in two parts, 190440 and 40, that multiplied together give a square (7617600 = 2760²).

The spelling of 19044040 in words is "nineteen million, forty-four thousand, forty".