16205240 has 32 divisors (see below), whose sum is σ = 36720000. Its totient is φ = 6436224.

The previous prime is 16205239. The next prime is 16205243. The reversal of 16205240 is 4250261.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16205243) 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, 4601 + ... + 7319.

It is an arithmetic number, because the mean of its divisors is an integer number (1147500).

Almost surely, 2^16205240 is an apocalyptic number.

16205240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16205240 is an abundant number, since it is smaller than the sum of its proper divisors (20514760).

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

16205240 is a wasteful number, since it uses less digits than its factorization.

16205240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879 (or 2875 counting only the distinct ones).

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

The square root of 16205240 is about 4025.5732511035. The cubic root of 16205240 is about 253.0570780519.

The spelling of 16205240 in words is "sixteen million, two hundred five thousand, two hundred forty".