14639478 has 16 divisors (see below), whose sum is σ = 33461760. Its totient is φ = 4182696.

The previous prime is 14639473. The next prime is 14639483. The reversal of 14639478 is 87493641.

It is an interprime number because it is at equal distance from previous prime (14639473) and next prime (14639483).

It is a super-2 number, since 2×14639478² = 428628632224968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 348559 = 14639478 / (1 + 4 + 6 + 3 + 9 + 4 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14639473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174238 + ... + 174321.

It is an arithmetic number, because the mean of its divisors is an integer number (2091360).

Almost surely, 2^14639478 is an apocalyptic number.

14639478 is an abundant number, since it is smaller than the sum of its proper divisors (18822282).

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

14639478 is a wasteful number, since it uses less digits than its factorization.

14639478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348571.

The product of its digits is 145152, while the sum is 42.

The square root of 14639478 is about 3826.1570798910. The cubic root of 14639478 is about 244.6293325897.

The spelling of 14639478 in words is "fourteen million, six hundred thirty-nine thousand, four hundred seventy-eight".