478821885 has 8 divisors (see below), whose sum is σ = 766115040. Its totient is φ = 255371664.

The previous prime is 478821859. The next prime is 478821919. The reversal of 478821885 is 588128874.

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

It is not a de Polignac number, because 478821885 - 2¹² = 478817789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15960715 + ... + 15960744.

It is an arithmetic number, because the mean of its divisors is an integer number (95764380).

Almost surely, 2^478821885 is an apocalyptic number.

It is an amenable number.

478821885 is a deficient number, since it is larger than the sum of its proper divisors (287293155).

478821885 is a wasteful number, since it uses less digits than its factorization.

478821885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31921467.

The product of its digits is 1146880, while the sum is 51.

The square root of 478821885 is about 21881.9991088566. Note that the first 3 decimals coincide. The cubic root of 478821885 is about 782.3324250644.

The spelling of 478821885 in words is "four hundred seventy-eight million, eight hundred twenty-one thousand, eight hundred eighty-five".