19049540 has 24 divisors (see below), whose sum is σ = 40362840. Its totient is φ = 7551488.

The previous prime is 19049489. The next prime is 19049587. The reversal of 19049540 is 4594091.

It can be written as a sum of positive squares in 4 ways, for example, as 662596 + 18386944 = 814^2 + 4288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19049497 and 19049506.

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, 1955 + ... + 6474.

It is an arithmetic number, because the mean of its divisors is an integer number (1681785).

Almost surely, 2^19049540 is an apocalyptic number.

19049540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19049540 is an abundant number, since it is smaller than the sum of its proper divisors (21313300).

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

19049540 is a wasteful number, since it uses less digits than its factorization.

19049540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551 (or 8549 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 19049540 is about 4364.5778719138. The cubic root of 19049540 is about 267.0718804725.

The spelling of 19049540 in words is "nineteen million, forty-nine thousand, five hundred forty".