478755421 has 8 divisors (see below), whose sum is σ = 491383904. Its totient is φ = 466194960.

The previous prime is 478755397. The next prime is 478755437. The reversal of 478755421 is 124557874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 478755421 - 2¹⁵ = 478722653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478755451) 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, 2586 + ... + 31051.

It is an arithmetic number, because the mean of its divisors is an integer number (61422988).

Almost surely, 2^478755421 is an apocalyptic number.

It is an amenable number.

478755421 is a deficient number, since it is larger than the sum of its proper divisors (12628483).

478755421 is a wasteful number, since it uses less digits than its factorization.

478755421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34011.

The product of its digits is 313600, while the sum is 43.

The square root of 478755421 is about 21880.4803649280. The cubic root of 478755421 is about 782.2962255575.

The spelling of 478755421 in words is "four hundred seventy-eight million, seven hundred fifty-five thousand, four hundred twenty-one".