16440988 has 6 divisors (see below), whose sum is σ = 28771736. Its totient is φ = 8220492.

The previous prime is 16440979. The next prime is 16441003. The reversal of 16440988 is 88904461.

It is a super-3 number, since 3×16440988³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16440988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055120 + ... + 2055127.

Almost surely, 2^16440988 is an apocalyptic number.

It is an amenable number.

16440988 is a deficient number, since it is larger than the sum of its proper divisors (12330748).

16440988 is a wasteful number, since it uses less digits than its factorization.

16440988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110251 (or 4110249 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 16440988 is about 4054.7488208273. The cubic root of 16440988 is about 254.2783028482.

The spelling of 16440988 in words is "sixteen million, four hundred forty thousand, nine hundred eighty-eight".