16378078 has 4 divisors (see below), whose sum is σ = 24567120. Its totient is φ = 8189038.

The previous prime is 16378051. The next prime is 16378081. The reversal of 16378078 is 87087361.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16378078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094518 + ... + 4094521.

It is an arithmetic number, because the mean of its divisors is an integer number (6141780).

Almost surely, 2^16378078 is an apocalyptic number.

16378078 is a deficient number, since it is larger than the sum of its proper divisors (8189042).

16378078 is an equidigital number, since it uses as much as digits as its factorization.

16378078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8189041.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 16378078 is about 4046.9838151394. The cubic root of 16378078 is about 253.9535637515.

The spelling of 16378078 in words is "sixteen million, three hundred seventy-eight thousand, seventy-eight".