16940778 has 8 divisors (see below), whose sum is σ = 33881568. Its totient is φ = 5646924.

The previous prime is 16940773. The next prime is 16940827. The reversal of 16940778 is 87704961.

It is a sphenic number, since it is the product of 3 distinct primes.

16940778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (16940773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411726 + ... + 1411737.

It is an arithmetic number, because the mean of its divisors is an integer number (4235196).

Almost surely, 2^16940778 is an apocalyptic number.

16940778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16940778 is a wasteful number, since it uses less digits than its factorization.

16940778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823468.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 16940778 is about 4115.9176376599. The cubic root of 16940778 is about 256.8292304243.

The spelling of 16940778 in words is "sixteen million, nine hundred forty thousand, seven hundred seventy-eight".