16420380 has 48 divisors (see below), whose sum is σ = 47567520. Its totient is φ = 4227328.

The previous prime is 16420373. The next prime is 16420399. The reversal of 16420380 is 8302461.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 16420380.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2979 + ... + 6458.

It is an arithmetic number, because the mean of its divisors is an integer number (990990).

Almost surely, 2^16420380 is an apocalyptic number.

16420380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16420380 is an abundant number, since it is smaller than the sum of its proper divisors (31147140).

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

16420380 is a wasteful number, since it uses less digits than its factorization.

16420380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478 (or 9476 counting only the distinct ones).

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

The square root of 16420380 is about 4052.2068061736. The cubic root of 16420380 is about 254.1720164899.

The spelling of 16420380 in words is "sixteen million, four hundred twenty thousand, three hundred eighty".