16398090 has 24 divisors (see below), whose sum is σ = 42635268. Its totient is φ = 4372800.

The previous prime is 16398017. The next prime is 16398091. The reversal of 16398090 is 9089361.

It can be written as a sum of positive squares in 2 ways, for example, as 16378209 + 19881 = 4047^2 + 141^2 .

It is not an unprimeable number, because it can be changed into a prime (16398091) 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 11 ways as a sum of consecutive naturals, for example, 91011 + ... + 91190.

Almost surely, 2^16398090 is an apocalyptic number.

16398090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16398090 is an abundant number, since it is smaller than the sum of its proper divisors (26237178).

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

16398090 is a wasteful number, since it uses less digits than its factorization.

16398090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182214 (or 182211 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16398090 is about 4049.4555189556. The cubic root of 16398090 is about 254.0569550085.

The spelling of 16398090 in words is "sixteen million, three hundred ninety-eight thousand, ninety".