16000420 has 36 divisors (see below), whose sum is σ = 34319124. Its totient is φ = 6265600.

The previous prime is 16000409. The next prime is 16000447. The reversal of 16000420 is 2400061.

It can be written as a sum of positive squares in 6 ways, for example, as 191844 + 15808576 = 438^2 + 3976^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16000420.

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 11 ways as a sum of consecutive naturals, for example, 158370 + ... + 158470.

It is an arithmetic number, because the mean of its divisors is an integer number (953309).

Almost surely, 2^16000420 is an apocalyptic number.

16000420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16000420 is an abundant number, since it is smaller than the sum of its proper divisors (18318704).

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

16000420 is a wasteful number, since it uses less digits than its factorization.

16000420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 16000420 is about 4000.0524996555. The cubic root of 16000420 is about 251.9864148215.

Adding to 16000420 its reverse (2400061), we get a palindrome (18400481).

The spelling of 16000420 in words is "sixteen million, four hundred twenty", and thus it is an aban number.