19008040 has 32 divisors (see below), whose sum is σ = 45285480. Its totient is φ = 7155712.

The previous prime is 19008013. The next prime is 19008043. The reversal of 19008040 is 4080091.

It can be written as a sum of positive squares in 4 ways, for example, as 18992164 + 15876 = 4358^2 + 126^2 .

It is a super-2 number, since 2×19008040² = 722611169283200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19008043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13297 + ... + 14656.

Almost surely, 2^19008040 is an apocalyptic number.

19008040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19008040 is an abundant number, since it is smaller than the sum of its proper divisors (26277440).

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

19008040 is a wasteful number, since it uses less digits than its factorization.

19008040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27981 (or 27977 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 19008040 is about 4359.8210972470. The cubic root of 19008040 is about 266.8777980719.

The spelling of 19008040 in words is "nineteen million, eight thousand, forty".