16579940 has 48 divisors (see below), whose sum is σ = 38394048. Its totient is φ = 5975424.

The previous prime is 16579939. The next prime is 16579961. The reversal of 16579940 is 4997561.

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, 10439 + ... + 11921.

It is an arithmetic number, because the mean of its divisors is an integer number (799876).

Almost surely, 2^16579940 is an apocalyptic number.

16579940 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 16579940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19197024).

16579940 is an abundant number, since it is smaller than the sum of its proper divisors (21814108).

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

16579940 is a wasteful number, since it uses less digits than its factorization.

16579940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 16579940 is about 4071.8472466437. The cubic root of 16579940 is about 254.9926436427.

The spelling of 16579940 in words is "sixteen million, five hundred seventy-nine thousand, nine hundred forty".