16949780 has 24 divisors (see below), whose sum is σ = 35965608. Its totient is φ = 6709248.

The previous prime is 16949773. The next prime is 16949789. The reversal of 16949780 is 8794961.

It can be written as a sum of positive squares in 4 ways, for example, as 917764 + 16032016 = 958^2 + 4004^2 .

It is a super-3 number, since 3×16949780³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16949789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (1498567).

Almost surely, 2^16949780 is an apocalyptic number.

16949780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16949780 is an abundant number, since it is smaller than the sum of its proper divisors (19015828).

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

16949780 is a wasteful number, since it uses less digits than its factorization.

16949780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8841 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16949780 is about 4117.0110517219. The cubic root of 16949780 is about 256.8747137219.

The spelling of 16949780 in words is "sixteen million, nine hundred forty-nine thousand, seven hundred eighty".