16142640 has 40 divisors (see below), whose sum is σ = 50042928. Its totient is φ = 4304640.

The previous prime is 16142629. The next prime is 16142653. The reversal of 16142640 is 4624161.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 16142640.

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, 33391 + ... + 33870.

Almost surely, 2^16142640 is an apocalyptic number.

16142640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16142640 is an abundant number, since it is smaller than the sum of its proper divisors (33900288).

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

16142640 is a wasteful number, since it uses less digits than its factorization.

16142640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67277 (or 67271 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 16142640 is about 4017.7904375415. The cubic root of 16142640 is about 252.7308087894.

The spelling of 16142640 in words is "sixteen million, one hundred forty-two thousand, six hundred forty".