16919940 has 48 divisors (see below), whose sum is σ = 48037248. Its totient is φ = 4449024.

The previous prime is 16919923. The next prime is 16919957. The reversal of 16919940 is 4991961.

It is an interprime number because it is at equal distance from previous prime (16919923) and next prime (16919957).

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, 2449 + ... + 6311.

It is an arithmetic number, because the mean of its divisors is an integer number (1000776).

Almost surely, 2^16919940 is an apocalyptic number.

16919940 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 16919940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24018624).

16919940 is an abundant number, since it is smaller than the sum of its proper divisors (31117308).

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

16919940 is a wasteful number, since it uses less digits than its factorization.

16919940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 16919940 is about 4113.3854669846. The cubic root of 16919940 is about 256.7238829734.

The spelling of 16919940 in words is "sixteen million, nine hundred nineteen thousand, nine hundred forty".