16209690 has 48 divisors (see below), whose sum is σ = 45258912. Its totient is φ = 3704736.

The previous prime is 16209643. The next prime is 16209691. The reversal of 16209690 is 9690261.

It is a happy number.

It is a super-2 number, since 2×16209690² = 525508099792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16209691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4044 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (942894).

Almost surely, 2^16209690 is an apocalyptic number.

16209690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16209690 is an abundant number, since it is smaller than the sum of its proper divisors (29049222).

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

16209690 is a wasteful number, since it uses less digits than its factorization.

16209690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051 (or 11044 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 16209690 is about 4026.1259294761. The cubic root of 16209690 is about 253.0802393037.

The spelling of 16209690 in words is "sixteen million, two hundred nine thousand, six hundred ninety".