16987980 has 24 divisors (see below), whose sum is σ = 47566512. Its totient is φ = 4530112.

The previous prime is 16987973. The next prime is 16987987. The reversal of 16987980 is 8978961.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16987973) and next prime (16987987).

It is not an unprimeable number, because it can be changed into a prime (16987987) 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 7 ways as a sum of consecutive naturals, for example, 141507 + ... + 141626.

It is an arithmetic number, because the mean of its divisors is an integer number (1981938).

Almost surely, 2^16987980 is an apocalyptic number.

16987980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16987980 is an abundant number, since it is smaller than the sum of its proper divisors (30578532).

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

16987980 is a wasteful number, since it uses less digits than its factorization.

16987980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283145 (or 283143 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 16987980 is about 4121.6477287609. The cubic root of 16987980 is about 257.0675431994.

The spelling of 16987980 in words is "sixteen million, nine hundred eighty-seven thousand, nine hundred eighty".