16540380 has 72 divisors (see below), whose sum is σ = 51363312. Its totient is φ = 4306176.

The previous prime is 16540367. The next prime is 16540387. The reversal of 16540380 is 8304561.

16540380 is a `hidden beast` number, since 1 + 654 + 0 + 3 + 8 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6672 + ... + 8808.

Almost surely, 2^16540380 is an apocalyptic number.

16540380 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 16540380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25681656).

16540380 is an abundant number, since it is smaller than the sum of its proper divisors (34822932).

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

16540380 is a wasteful number, since it uses less digits than its factorization.

16540380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195 (or 2190 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 16540380 is about 4066.9865994370. The cubic root of 16540380 is about 254.7896766312.

The spelling of 16540380 in words is "sixteen million, five hundred forty thousand, three hundred eighty".