16722890 has 16 divisors (see below), whose sum is σ = 30915432. Its totient is φ = 6508224.

The previous prime is 16722859. The next prime is 16722899. The reversal of 16722890 is 9822761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16703569 + 19321 = 4087^2 + 139^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16722890.

It is not an unprimeable number, because it can be changed into a prime (16722899) 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, 22229 + ... + 22968.

Almost surely, 2^16722890 is an apocalyptic number.

16722890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16722890 is a deficient number, since it is larger than the sum of its proper divisors (14192542).

16722890 is a wasteful number, since it uses less digits than its factorization.

16722890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45241.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 16722890 is about 4089.3630310844. The cubic root of 16722890 is about 255.7233848925.

The spelling of 16722890 in words is "sixteen million, seven hundred twenty-two thousand, eight hundred ninety".