16402230 has 64 divisors (see below), whose sum is σ = 47113920. Its totient is φ = 4036608.

The previous prime is 16402223. The next prime is 16402231. The reversal of 16402230 is 3220461.

It is a happy number.

16402230 is a `hidden beast` number, since 1 + 640 + 2 + 23 + 0 = 666.

It is a super-3 number, since 3×16402230³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174 + ... + 5846.

It is an arithmetic number, because the mean of its divisors is an integer number (736155).

Almost surely, 2^16402230 is an apocalyptic number.

16402230 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 16402230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23556960).

16402230 is an abundant number, since it is smaller than the sum of its proper divisors (30711690).

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

16402230 is a wasteful number, since it uses less digits than its factorization.

16402230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702 (or 4696 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16402230 is about 4049.9666665295. The cubic root of 16402230 is about 254.0783336628.

Adding to 16402230 its reverse (3220461), we get a palindrome (19622691).

The spelling of 16402230 in words is "sixteen million, four hundred two thousand, two hundred thirty".