16461780 has 48 divisors (see below), whose sum is σ = 48807360. Its totient is φ = 4131328.

The previous prime is 16461779. The next prime is 16461791. The reversal of 16461780 is 8716461.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7050 + ... + 9089.

It is an arithmetic number, because the mean of its divisors is an integer number (1016820).

Almost surely, 2^16461780 is an apocalyptic number.

16461780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16461780 is an abundant number, since it is smaller than the sum of its proper divisors (32345580).

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

16461780 is a wasteful number, since it uses less digits than its factorization.

16461780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16168 (or 16166 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 16461780 is about 4057.3119180068. The cubic root of 16461780 is about 254.3854482203.

Subtracting from 16461780 its product of nonzero digits (8064), we obtain a triangular number (16453716 = T₅₇₃₆).

The spelling of 16461780 in words is "sixteen million, four hundred sixty-one thousand, seven hundred eighty".