14978407 has 4 divisors (see below), whose sum is σ = 15343776. Its totient is φ = 14613040.

The previous prime is 14978393. The next prime is 14978417. The reversal of 14978407 is 70487941.

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

It is a cyclic number.

It is not a de Polignac number, because 14978407 - 2⁷ = 14978279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14978407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14978417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182623 + ... + 182704.

It is an arithmetic number, because the mean of its divisors is an integer number (3835944).

Almost surely, 2^14978407 is an apocalyptic number.

14978407 is a deficient number, since it is larger than the sum of its proper divisors (365369).

14978407 is an equidigital number, since it uses as much as digits as its factorization.

14978407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365368.

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

The square root of 14978407 is about 3870.1946979448. The cubic root of 14978407 is about 246.5028107866.

The spelling of 14978407 in words is "fourteen million, nine hundred seventy-eight thousand, four hundred seven".