16461440 has 96 divisors (see below), whose sum is σ = 42273900. Its totient is φ = 6127616.

The previous prime is 16461409. The next prime is 16461463. The reversal of 16461440 is 4416461.

16461440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 9193024 + 7268416 = 3032^2 + 2696^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184916 + ... + 185004.

Almost surely, 2^16461440 is an apocalyptic number.

16461440 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 16461440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21136950).

16461440 is an abundant number, since it is smaller than the sum of its proper divisors (25812460).

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

16461440 is an equidigital number, since it uses as much as digits as its factorization.

16461440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 16461440 is about 4057.2700181280. The cubic root of 16461440 is about 254.3836968575.

The spelling of 16461440 in words is "sixteen million, four hundred sixty-one thousand, four hundred forty".