16401478 has 4 divisors (see below), whose sum is σ = 24602220. Its totient is φ = 8200738.

The previous prime is 16401467. The next prime is 16401487. The reversal of 16401478 is 87410461.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 4100368 + ... + 4100371.

It is an arithmetic number, because the mean of its divisors is an integer number (6150555).

Almost surely, 2^16401478 is an apocalyptic number.

16401478 is a deficient number, since it is larger than the sum of its proper divisors (8200742).

16401478 is an equidigital number, since it uses as much as digits as its factorization.

16401478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200741.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 16401478 is about 4049.8738251951. The cubic root of 16401478 is about 254.0744506577.

The spelling of 16401478 in words is "sixteen million, four hundred one thousand, four hundred seventy-eight".