71232138 has 12 divisors (see below), whose sum is σ = 154336338. Its totient is φ = 23744040.

The previous prime is 71232137. The next prime is 71232143. The reversal of 71232138 is 83123217.

It can be written as a sum of positive squares in only one way, i.e., 70006689 + 1225449 = 8367^2 + 1107^2 .

It is not an unprimeable number, because it can be changed into a prime (71232137) 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, 1978653 + ... + 1978688.

Almost surely, 2^71232138 is an apocalyptic number.

71232138 is an abundant number, since it is smaller than the sum of its proper divisors (83104200).

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

71232138 is a wasteful number, since it uses less digits than its factorization.

71232138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957349 (or 3957346 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 71232138 is about 8439.9133881812. The cubic root of 71232138 is about 414.5325709240.

It can be divided in two parts, 7123 and 2138, that added together give a cube (9261 = 21³).

The spelling of 71232138 in words is "seventy-one million, two hundred thirty-two thousand, one hundred thirty-eight".