247072871990 has 48 divisors (see below), whose sum is σ = 517390869600. Its totient is φ = 84702425472.

The previous prime is 247072871989. The next prime is 247072872019. The reversal of 247072871990 is 99178270742.

247072871990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247072871990² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7096946 + ... + 7131674.

It is an arithmetic number, because the mean of its divisors is an integer number (10778976450).

Almost surely, 2^247072871990 is an apocalyptic number.

247072871990 is an abundant number, since it is smaller than the sum of its proper divisors (270317997610).

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

247072871990 is a wasteful number, since it uses less digits than its factorization.

247072871990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49269 (or 49262 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 247072871990 in words is "two hundred forty-seven billion, seventy-two million, eight hundred seventy-one thousand, nine hundred ninety".