19688340 has 48 divisors (see below), whose sum is σ = 63004032. Its totient is φ = 4500096.

The previous prime is 19688311. The next prime is 19688353. The reversal of 19688340 is 4388691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23019 + ... + 23858.

It is an arithmetic number, because the mean of its divisors is an integer number (1312584).

Almost surely, 2^19688340 is an apocalyptic number.

19688340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19688340 is an abundant number, since it is smaller than the sum of its proper divisors (43315692).

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

19688340 is a wasteful number, since it uses less digits than its factorization.

19688340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46896 (or 46894 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 19688340 is about 4437.1544935916. The cubic root of 19688340 is about 270.0244148018.

The spelling of 19688340 in words is "nineteen million, six hundred eighty-eight thousand, three hundred forty".