478172136 has 32 divisors (see below), whose sum is σ = 1287387360. Its totient is φ = 147129792.

The previous prime is 478172111. The next prime is 478172137. The reversal of 478172136 is 631271874.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 478172094 and 478172103.

It is not an unprimeable number, because it can be changed into a prime (478172137) 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, 765990 + ... + 766613.

It is an arithmetic number, because the mean of its divisors is an integer number (40230855).

Almost surely, 2^478172136 is an apocalyptic number.

It is an amenable number.

478172136 is an abundant number, since it is smaller than the sum of its proper divisors (809215224).

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

478172136 is a wasteful number, since it uses less digits than its factorization.

478172136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532625 (or 1532621 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 478172136 is about 21867.1474134145. The cubic root of 478172136 is about 781.9783965443.

The spelling of 478172136 in words is "four hundred seventy-eight million, one hundred seventy-two thousand, one hundred thirty-six".