19768040 has 32 divisors (see below), whose sum is σ = 46414080. Its totient is φ = 7563072.

The previous prime is 19768039. The next prime is 19768043. The reversal of 19768040 is 4086791.

It is not an unprimeable number, because it can be changed into a prime (19768043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9824 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (1450440).

Almost surely, 2^19768040 is an apocalyptic number.

19768040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19768040 is an abundant number, since it is smaller than the sum of its proper divisors (26646040).

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

19768040 is a wasteful number, since it uses less digits than its factorization.

19768040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21521 (or 21517 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 19768040 is about 4446.1264039611. The cubic root of 19768040 is about 270.3882845081.

The spelling of 19768040 in words is "nineteen million, seven hundred sixty-eight thousand, forty".