16245540 has 72 divisors (see below), whose sum is σ = 52186680. Its totient is φ = 4076544.

The previous prime is 16245533. The next prime is 16245571. The reversal of 16245540 is 4554261.

It can be written as a sum of positive squares in 4 ways, for example, as 181476 + 16064064 = 426^2 + 4008^2 .

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, 406 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (724815).

Almost surely, 2^16245540 is an apocalyptic number.

16245540 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 16245540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26093340).

16245540 is an abundant number, since it is smaller than the sum of its proper divisors (35941140).

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

16245540 is a wasteful number, since it uses less digits than its factorization.

16245540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5341 (or 5336 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 16245540 is about 4030.5756412701. The cubic root of 16245540 is about 253.2666760607.

The spelling of 16245540 in words is "sixteen million, two hundred forty-five thousand, five hundred forty".