16881004 has 24 divisors (see below), whose sum is σ = 33881120. Its totient is φ = 7209216.

The previous prime is 16881001. The next prime is 16881013. The reversal of 16881004 is 40018861.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (16881001) 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, 8542 + ... + 10330.

Almost surely, 2^16881004 is an apocalyptic number.

16881004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16881004 is an abundant number, since it is smaller than the sum of its proper divisors (17000116).

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

16881004 is a wasteful number, since it uses less digits than its factorization.

16881004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 16881004 is about 4108.6498999063. The cubic root of 16881004 is about 256.5268082333.

Adding to 16881004 its reverse (40018861), we get a palindrome (56899865).

The spelling of 16881004 in words is "sixteen million, eight hundred eighty-one thousand, four".