16512340 has 48 divisors (see below), whose sum is σ = 38278800. Its totient is φ = 5944320.

The previous prime is 16512319. The next prime is 16512341. The reversal of 16512340 is 4321561.

It can be written as a sum of positive squares in 8 ways, for example, as 5740816 + 10771524 = 2396^2 + 3282^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16512341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9886 + ... + 11434.

It is an arithmetic number, because the mean of its divisors is an integer number (797475).

Almost surely, 2^16512340 is an apocalyptic number.

16512340 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 16512340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19139400).

16512340 is an abundant number, since it is smaller than the sum of its proper divisors (21766460).

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

16512340 is a wasteful number, since it uses less digits than its factorization.

16512340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16512340 is about 4063.5378674254. The cubic root of 16512340 is about 254.6456182026.

The spelling of 16512340 in words is "sixteen million, five hundred twelve thousand, three hundred forty".