16461720 has 96 divisors (see below), whose sum is σ = 58378320. Its totient is φ = 3989760.

The previous prime is 16461689. The next prime is 16461737. The reversal of 16461720 is 2716461.

16461720 is a `hidden beast` number, since 1 + 646 + 17 + 2 + 0 = 666.

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, 1882 + ... + 6038.

Almost surely, 2^16461720 is an apocalyptic number.

16461720 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 16461720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29189160).

16461720 is an abundant number, since it is smaller than the sum of its proper divisors (41916600).

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

16461720 is a wasteful number, since it uses less digits than its factorization.

16461720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185 (or 4178 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 16461720 is about 4057.3045239420. The cubic root of 16461720 is about 254.3851391580.

The spelling of 16461720 in words is "sixteen million, four hundred sixty-one thousand, seven hundred twenty".