16540040 has 32 divisors (see below), whose sum is σ = 40599360. Its totient is φ = 6014400.

The previous prime is 16540037. The next prime is 16540061. The reversal of 16540040 is 4004561.

16540040 = T₂₃ + T₂₄ + ... + T₄₆₂.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 16539994 and 16540021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18356 + ... + 19235.

It is an arithmetic number, because the mean of its divisors is an integer number (1268730).

Almost surely, 2^16540040 is an apocalyptic number.

16540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16540040 is an abundant number, since it is smaller than the sum of its proper divisors (24059320).

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

16540040 is a wasteful number, since it uses less digits than its factorization.

16540040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37613 (or 37609 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 16540040 is about 4066.9447992320. The cubic root of 16540040 is about 254.7879308211.

The spelling of 16540040 in words is "sixteen million, five hundred forty thousand, forty".