16001240 has 16 divisors (see below), whose sum is σ = 36002880. Its totient is φ = 6400480.

The previous prime is 16001231. The next prime is 16001269. The reversal of 16001240 is 4210061.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 199976 + ... + 200055.

It is an arithmetic number, because the mean of its divisors is an integer number (2250180).

Almost surely, 2^16001240 is an apocalyptic number.

16001240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16001240 is an abundant number, since it is smaller than the sum of its proper divisors (20001640).

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

16001240 is a wasteful number, since it uses less digits than its factorization.

16001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400042 (or 400038 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 16001240 is about 4000.1549969970. The cubic root of 16001240 is about 251.9907194029.

The spelling of 16001240 in words is "sixteen million, one thousand, two hundred forty".