478830981 has 8 divisors (see below), whose sum is σ = 638840224. Its totient is φ = 319021200.

The previous prime is 478830973. The next prime is 478830983. The reversal of 478830981 is 189038874.

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

It is not a de Polignac number, because 478830981 - 2³ = 478830973 is a prime.

It is a super-2 number, since 2×478830981² = 458558216730844722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 478830981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478830983) 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, 44170 + ... + 53931.

It is an arithmetic number, because the mean of its divisors is an integer number (79855028).

Almost surely, 2^478830981 is an apocalyptic number.

It is an amenable number.

478830981 is a deficient number, since it is larger than the sum of its proper divisors (160009243).

478830981 is a wasteful number, since it uses less digits than its factorization.

478830981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99731.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 478830981 is about 21882.2069499399. The cubic root of 478830981 is about 782.3373789250.

The spelling of 478830981 in words is "four hundred seventy-eight million, eight hundred thirty thousand, nine hundred eighty-one".