16780050 has 108 divisors (see below), whose sum is σ = 52511706. Its totient is φ = 3830400.

The previous prime is 16780031. The next prime is 16780051. The reversal of 16780050 is 5008761.

It can be written as a sum of positive squares in 3 ways, for example, as 6456681 + 10323369 = 2541^2 + 3213^2 .

It is a Curzon number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 16779996 and 16780023.

It is not an unprimeable number, because it can be changed into a prime (16780051) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 21670 + ... + 22430.

Almost surely, 2^16780050 is an apocalyptic number.

16780050 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 16780050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26255853).

16780050 is an abundant number, since it is smaller than the sum of its proper divisors (35731656).

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

16780050 is a wasteful number, since it uses less digits than its factorization.

16780050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 16780050 is about 4096.3459326575. The cubic root of 16780050 is about 256.0144136578.

The spelling of 16780050 in words is "sixteen million, seven hundred eighty thousand, fifty".