16540394 has 16 divisors (see below), whose sum is σ = 27159720. Its totient is φ = 7508160.

The previous prime is 16540387. The next prime is 16540397. The reversal of 16540394 is 49304561.

It can be written as a sum of positive squares in 4 ways, for example, as 12075625 + 4464769 = 3475^2 + 2113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16540394.

It is not an unprimeable number, because it can be changed into a prime (16540397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3629 + ... + 6800.

Almost surely, 2^16540394 is an apocalyptic number.

16540394 is a deficient number, since it is larger than the sum of its proper divisors (10619326).

16540394 is a wasteful number, since it uses less digits than its factorization.

16540394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 16540394 is about 4066.9883206127. The cubic root of 16540394 is about 254.7897485170.

The spelling of 16540394 in words is "sixteen million, five hundred forty thousand, three hundred ninety-four".