16263990 has 112 divisors (see below), whose sum is σ = 46273248. Its totient is φ = 4105728.

The previous prime is 16263971. The next prime is 16263997. The reversal of 16263990 is 9936261.

16263990 is a `hidden beast` number, since 16 + 2 + 639 + 9 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16263997) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 167622 + ... + 167718.

It is an arithmetic number, because the mean of its divisors is an integer number (413154).

Almost surely, 2^16263990 is an apocalyptic number.

16263990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16263990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23136624).

16263990 is an abundant number, since it is smaller than the sum of its proper divisors (30009258).

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

16263990 is an equidigital number, since it uses as much as digits as its factorization.

16263990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 16263990 is about 4032.8637467685. The cubic root of 16263990 is about 253.3625177981.

The spelling of 16263990 in words is "sixteen million, two hundred sixty-three thousand, nine hundred ninety".