19838988 has 36 divisors (see below), whose sum is σ = 54007408. Its totient is φ = 6104160.

The previous prime is 19838971. The next prime is 19838989. The reversal of 19838988 is 88983891.

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

It is a super-3 number, since 3×19838988³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19838989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20728 + ... + 21663.

Almost surely, 2^19838988 is an apocalyptic number.

19838988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19838988 is an abundant number, since it is smaller than the sum of its proper divisors (34168420).

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

19838988 is a wasteful number, since it uses less digits than its factorization.

19838988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42414 (or 42409 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 19838988 is about 4454.0978884618. The cubic root of 19838988 is about 270.7113751067.

The spelling of 19838988 in words is "nineteen million, eight hundred thirty-eight thousand, nine hundred eighty-eight".