16144820 has 12 divisors (see below), whose sum is σ = 33904164. Its totient is φ = 6457920.

The previous prime is 16144811. The next prime is 16144837. The reversal of 16144820 is 2844161.

It can be written as a sum of positive squares in 2 ways, for example, as 9560464 + 6584356 = 3092^2 + 2566^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16144820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403601 + ... + 403640.

It is an arithmetic number, because the mean of its divisors is an integer number (2825347).

Almost surely, 2^16144820 is an apocalyptic number.

16144820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16144820 is an abundant number, since it is smaller than the sum of its proper divisors (17759344).

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

16144820 is a wasteful number, since it uses less digits than its factorization.

16144820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807250 (or 807248 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 16144820 is about 4018.0617217758. The cubic root of 16144820 is about 252.7421850443.

Adding to 16144820 its reverse (2844161), we get a palindrome (18988981).

The spelling of 16144820 in words is "sixteen million, one hundred forty-four thousand, eight hundred twenty".