478229931 has 6 divisors (see below), whose sum is σ = 690776580. Its totient is φ = 318819948.

The previous prime is 478229893. The next prime is 478229951. The reversal of 478229931 is 139922874.

It is not a de Polignac number, because 478229931 - 2¹⁹ = 477705643 is a prime.

It is a super-2 number, since 2×478229931² = 457407733808529522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478229951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26568321 + ... + 26568338.

It is an arithmetic number, because the mean of its divisors is an integer number (115129430).

Almost surely, 2^478229931 is an apocalyptic number.

478229931 is a deficient number, since it is larger than the sum of its proper divisors (212546649).

478229931 is a wasteful number, since it uses less digits than its factorization.

478229931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53136665 (or 53136662 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 478229931 is about 21868.4688764440. The cubic root of 478229931 is about 782.0099002765.

The spelling of 478229931 in words is "four hundred seventy-eight million, two hundred twenty-nine thousand, nine hundred thirty-one".