16998840 has 96 divisors (see below), whose sum is σ = 57676320. Its totient is φ = 4333824.

The previous prime is 16998833. The next prime is 16998857. The reversal of 16998840 is 4889961.

It is a super-2 number, since 2×16998840² = 577921122691200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7254 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (600795).

Almost surely, 2^16998840 is an apocalyptic number.

16998840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16998840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28838160).

16998840 is an abundant number, since it is smaller than the sum of its proper divisors (40677480).

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

16998840 is a wasteful number, since it uses less digits than its factorization.

16998840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 16998840 is about 4122.9649525554. The cubic root of 16998840 is about 257.1223105276.

The spelling of 16998840 in words is "sixteen million, nine hundred ninety-eight thousand, eight hundred forty".