14640478 has 4 divisors (see below), whose sum is σ = 21960720. Its totient is φ = 7320238.

The previous prime is 14640377. The next prime is 14640491. The reversal of 14640478 is 87404641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87404641 = 131 ⋅667211.

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, 3660118 + ... + 3660121.

It is an arithmetic number, because the mean of its divisors is an integer number (5490180).

Almost surely, 2^14640478 is an apocalyptic number.

14640478 is a deficient number, since it is larger than the sum of its proper divisors (7320242).

14640478 is an equidigital number, since it uses as much as digits as its factorization.

14640478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7320241.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 14640478 is about 3826.2877570826. The cubic root of 14640478 is about 244.6349025461.

The spelling of 14640478 in words is "fourteen million, six hundred forty thousand, four hundred seventy-eight".