31390445268 has 144 divisors (see below), whose sum is σ = 101952096960. Its totient is φ = 8278780608.

The previous prime is 31390445267. The next prime is 31390445293. The reversal of 31390445268 is 86254409313.

31390445268 is a `hidden beast` number, since 3 + 139 + 0 + 4 + 452 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31390445267) by changing a digit.

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 in 47 ways as a sum of consecutive naturals, for example, 159346 + ... + 296937.

Almost surely, 2^31390445268 is an apocalyptic number.

It is an amenable number.

31390445268 is an abundant number, since it is smaller than the sum of its proper divisors (70561651692).

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

31390445268 is a wasteful number, since it uses less digits than its factorization.

31390445268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456323 (or 456308 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 31390445268 in words is "thirty-one billion, three hundred ninety million, four hundred forty-five thousand, two hundred sixty-eight".