16535140 has 24 divisors (see below), whose sum is σ = 34808760. Its totient is φ = 6597888.

The previous prime is 16535107. The next prime is 16535147. The reversal of 16535140 is 4153561.

It can be written as a sum of positive squares in 4 ways, for example, as 3154176 + 13380964 = 1776^2 + 3658^2 .

It is not an unprimeable number, because it can be changed into a prime (16535147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10654 + ... + 12106.

It is an arithmetic number, because the mean of its divisors is an integer number (1450365).

Almost surely, 2^16535140 is an apocalyptic number.

16535140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16535140 is an abundant number, since it is smaller than the sum of its proper divisors (18273620).

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

16535140 is a wasteful number, since it uses less digits than its factorization.

16535140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031 (or 2029 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 16535140 is about 4066.3423367936. The cubic root of 16535140 is about 254.7627679605.

The spelling of 16535140 in words is "sixteen million, five hundred thirty-five thousand, one hundred forty".