14778420 has 48 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 3769216.

The previous prime is 14778403. The next prime is 14778427. The reversal of 14778420 is 2487741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14778427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3975 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (899640).

Almost surely, 2^14778420 is an apocalyptic number.

14778420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14778420 is an abundant number, since it is smaller than the sum of its proper divisors (28404300).

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

14778420 is a wasteful number, since it uses less digits than its factorization.

14778420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10744 (or 10742 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 14778420 is about 3844.2710622431. The cubic root of 14778420 is about 245.4008155246.

The spelling of 14778420 in words is "fourteen million, seven hundred seventy-eight thousand, four hundred twenty".