19040540 has 24 divisors (see below), whose sum is σ = 40643232. Its totient is φ = 7490880.

The previous prime is 19040521. The next prime is 19040551. The reversal of 19040540 is 4504091.

It is a happy number.

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, 6584 + ... + 9023.

It is an arithmetic number, because the mean of its divisors is an integer number (1693468).

Almost surely, 2^19040540 is an apocalyptic number.

19040540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19040540 is an abundant number, since it is smaller than the sum of its proper divisors (21602692).

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

19040540 is a wasteful number, since it uses less digits than its factorization.

19040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15677 (or 15675 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 19040540 is about 4363.5467225641. The cubic root of 19040540 is about 267.0298142676.

The spelling of 19040540 in words is "nineteen million, forty thousand, five hundred forty".