19648040 has 16 divisors (see below), whose sum is σ = 44208180. Its totient is φ = 7859200.

The previous prime is 19648037. The next prime is 19648063. The reversal of 19648040 is 4084691.

It can be written as a sum of positive squares in 2 ways, for example, as 19589476 + 58564 = 4426^2 + 242^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19647988 and 19648006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245561 + ... + 245640.

Almost surely, 2^19648040 is an apocalyptic number.

19648040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19648040 is an abundant number, since it is smaller than the sum of its proper divisors (24560140).

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

19648040 is a wasteful number, since it uses less digits than its factorization.

19648040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491212 (or 491208 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 19648040 is about 4432.6109687181. The cubic root of 19648040 is about 269.8400515842.

The spelling of 19648040 in words is "nineteen million, six hundred forty-eight thousand, forty".