16977216 has 28 divisors (see below), whose sum is σ = 44919392. Its totient is φ = 5659008.

The previous prime is 16977211. The next prime is 16977221. The reversal of 16977216 is 61277961.

It is an interprime number because it is at equal distance from previous prime (16977211) and next prime (16977221).

It is a super-2 number, since 2×16977216² = 576451726221312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16977211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44020 + ... + 44403.

It is an arithmetic number, because the mean of its divisors is an integer number (1604264).

Almost surely, 2^16977216 is an apocalyptic number.

16977216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16977216 is an abundant number, since it is smaller than the sum of its proper divisors (27942176).

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

16977216 is an equidigital number, since it uses as much as digits as its factorization.

16977216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88438 (or 88428 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 16977216 is about 4120.3417334003. The cubic root of 16977216 is about 257.0132369650.

The spelling of 16977216 in words is "sixteen million, nine hundred seventy-seven thousand, two hundred sixteen".