16940078 has 4 divisors (see below), whose sum is σ = 25410120. Its totient is φ = 8470038.

The previous prime is 16940071. The next prime is 16940113. The reversal of 16940078 is 87004961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87004961 = 383 ⋅227167.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16940071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4235018 + ... + 4235021.

It is an arithmetic number, because the mean of its divisors is an integer number (6352530).

Almost surely, 2^16940078 is an apocalyptic number.

16940078 is a deficient number, since it is larger than the sum of its proper divisors (8470042).

16940078 is an equidigital number, since it uses as much as digits as its factorization.

16940078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470041.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 16940078 is about 4115.8326010663. The cubic root of 16940078 is about 256.8256929453.

The spelling of 16940078 in words is "sixteen million, nine hundred forty thousand, seventy-eight".