19268840 has 16 divisors (see below), whose sum is σ = 43354980. Its totient is φ = 7707520.

The previous prime is 19268819. The next prime is 19268849. The reversal of 19268840 is 4886291.

It can be written as a sum of positive squares in 2 ways, for example, as 18992164 + 276676 = 4358^2 + 526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19268794 and 19268803.

It is not an unprimeable number, because it can be changed into a prime (19268849) 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, 240821 + ... + 240900.

Almost surely, 2^19268840 is an apocalyptic number.

19268840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19268840 is an abundant number, since it is smaller than the sum of its proper divisors (24086140).

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

19268840 is a wasteful number, since it uses less digits than its factorization.

19268840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481732 (or 481728 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 19268840 is about 4389.6286858913. The cubic root of 19268840 is about 268.0928244581.

The spelling of 19268840 in words is "nineteen million, two hundred sixty-eight thousand, eight hundred forty".