16780764 has 144 divisors (see below), whose sum is σ = 53387264. Its totient is φ = 3991680.

The previous prime is 16780727. The next prime is 16780787. The reversal of 16780764 is 46708761.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132069 + ... + 132195.

Almost surely, 2^16780764 is an apocalyptic number.

16780764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16780764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26693632).

16780764 is an abundant number, since it is smaller than the sum of its proper divisors (36606500).

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

16780764 is a wasteful number, since it uses less digits than its factorization.

16780764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 16780764 is about 4096.4330825732. The cubic root of 16780764 is about 256.0180447892.

The spelling of 16780764 in words is "sixteen million, seven hundred eighty thousand, seven hundred sixty-four".