9471432138 has 24 divisors (see below), whose sum is σ = 21650429472. Its totient is φ = 2705943264.

The previous prime is 9471432107. The next prime is 9471432149. The reversal of 9471432138 is 8312341749.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 9471432138.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 623206 + ... + 638222.

It is an arithmetic number, because the mean of its divisors is an integer number (902101228).

Almost surely, 2^9471432138 is an apocalyptic number.

9471432138 is an abundant number, since it is smaller than the sum of its proper divisors (12178997334).

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

9471432138 is an frugal number, since it uses more digits than its factorization.

9471432138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30046 (or 15029 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 9471432138 is about 97321.2830679908. The cubic root of 9471432138 is about 2115.7867057552.

Multiplying 9471432138 by its sum of digits (42), we get a square (397800149796 = 630714²).

9471432138 divided by its sum of digits (42) gives a square (225510289 = 15017²).

The spelling of 9471432138 in words is "nine billion, four hundred seventy-one million, four hundred thirty-two thousand, one hundred thirty-eight".