19768340 has 12 divisors (see below), whose sum is σ = 41513556. Its totient is φ = 7907328.

The previous prime is 19768321. The next prime is 19768351. The reversal of 19768340 is 4386791.

It can be written as a sum of positive squares in 2 ways, for example, as 2446096 + 17322244 = 1564^2 + 4162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19768294 and 19768303.

It is a congruent number.

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, 494189 + ... + 494228.

It is an arithmetic number, because the mean of its divisors is an integer number (3459463).

Almost surely, 2^19768340 is an apocalyptic number.

19768340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19768340 is an abundant number, since it is smaller than the sum of its proper divisors (21745216).

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

19768340 is a wasteful number, since it uses less digits than its factorization.

19768340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988426 (or 988424 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 19768340 is about 4446.1601410655. The cubic root of 19768340 is about 270.3896523064.

The spelling of 19768340 in words is "nineteen million, seven hundred sixty-eight thousand, three hundred forty".