16402988 has 48 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 6713280.

The previous prime is 16402949. The next prime is 16403017. The reversal of 16402988 is 88920461.

16402988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73445 + ... + 73667.

It is an arithmetic number, because the mean of its divisors is an integer number (715008).

Almost surely, 2^16402988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16402988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17160192).

16402988 is an abundant number, since it is smaller than the sum of its proper divisors (17917396).

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

16402988 is a wasteful number, since it uses less digits than its factorization.

16402988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 16402988 is about 4050.0602464655. The cubic root of 16402988 is about 254.0822475292.

The spelling of 16402988 in words is "sixteen million, four hundred two thousand, nine hundred eighty-eight".