16229988 has 36 divisors (see below), whose sum is σ = 42352128. Its totient is φ = 5235120.

The previous prime is 16229981. The next prime is 16229999. The reversal of 16229988 is 88992261.

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 (16229981) 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, 6156 + ... + 8387.

It is an arithmetic number, because the mean of its divisors is an integer number (1176448).

Almost surely, 2^16229988 is an apocalyptic number.

16229988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16229988 is an abundant number, since it is smaller than the sum of its proper divisors (26122140).

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

16229988 is a wasteful number, since it uses less digits than its factorization.

16229988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14584 (or 14579 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 16229988 is about 4028.6459263629. The cubic root of 16229988 is about 253.1858321101.

The spelling of 16229988 in words is "sixteen million, two hundred twenty-nine thousand, nine hundred eighty-eight".