31860272434 has 4 divisors (see below), whose sum is σ = 47790408654. Its totient is φ = 15930136216.

The previous prime is 31860272363. The next prime is 31860272453. The reversal of 31860272434 is 43427206813.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31814073225 + 46199209 = 178365^2 + 6797^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7965068107 + ... + 7965068110.

Almost surely, 2^31860272434 is an apocalyptic number.

31860272434 is a deficient number, since it is larger than the sum of its proper divisors (15930136220).

31860272434 is a wasteful number, since it uses less digits than its factorization.

31860272434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15930136219.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 31860272434 in words is "thirty-one billion, eight hundred sixty million, two hundred seventy-two thousand, four hundred thirty-four".