16402229 has 8 divisors (see below), whose sum is σ = 17652888. Its totient is φ = 15183360.

The previous prime is 16402223. The next prime is 16402231. The reversal of 16402229 is 92220461.

It can be written as a sum of positive squares in 4 ways, for example, as 3276100 + 13126129 = 1810^2 + 3623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16402229 - 2⁴ = 16402213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16402198 and 16402207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6872 + ... + 8945.

It is an arithmetic number, because the mean of its divisors is an integer number (2206611).

Almost surely, 2^16402229 is an apocalyptic number.

It is an amenable number.

16402229 is a deficient number, since it is larger than the sum of its proper divisors (1250659).

16402229 is a wasteful number, since it uses less digits than its factorization.

16402229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15895.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16402229 is about 4049.9665430717. The cubic root of 16402229 is about 254.0783284993.

The spelling of 16402229 in words is "sixteen million, four hundred two thousand, two hundred twenty-nine".