16722540 has 72 divisors (see below), whose sum is σ = 51590448. Its totient is φ = 4383360.

The previous prime is 16722533. The next prime is 16722569. The reversal of 16722540 is 4522761.

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, 10219 + ... + 11741.

It is an arithmetic number, because the mean of its divisors is an integer number (716534).

Almost surely, 2^16722540 is an apocalyptic number.

16722540 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 16722540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25795224).

16722540 is an abundant number, since it is smaller than the sum of its proper divisors (34867908).

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

16722540 is a wasteful number, since it uses less digits than its factorization.

16722540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 16722540 is about 4089.3202369098. The cubic root of 16722540 is about 255.7216008346.

The spelling of 16722540 in words is "sixteen million, seven hundred twenty-two thousand, five hundred forty".