19808748 has 36 divisors (see below), whose sum is σ = 50349208. Its totient is φ = 6566400.

The previous prime is 19808743. The next prime is 19808759. The reversal of 19808748 is 84780891.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (19808741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5523 + ... + 8373.

Almost surely, 2^19808748 is an apocalyptic number.

19808748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19808748 is an abundant number, since it is smaller than the sum of its proper divisors (30540460).

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

19808748 is a wasteful number, since it uses less digits than its factorization.

19808748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054 (or 3049 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 19808748 is about 4450.7019671059. The cubic root of 19808748 is about 270.5737593019.

It can be divided in two parts, 198087 and 48, that added together give a triangular number (198135 = T₆₂₉).

The spelling of 19808748 in words is "nineteen million, eight hundred eight thousand, seven hundred forty-eight".