247071988 has 12 divisors (see below), whose sum is σ = 436417632. Its totient is φ = 122381240.

The previous prime is 247071973. The next prime is 247071989. The reversal of 247071988 is 889170742.

247071988 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×247071988³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247071989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288208 + ... + 289063.

It is an arithmetic number, because the mean of its divisors is an integer number (36368136).

Almost surely, 2^247071988 is an apocalyptic number.

It is an amenable number.

247071988 is a deficient number, since it is larger than the sum of its proper divisors (189345644).

247071988 is a wasteful number, since it uses less digits than its factorization.

247071988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577382 (or 577380 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 247071988 is about 15718.5237220294. The cubic root of 247071988 is about 627.4914845699.

The spelling of 247071988 in words is "two hundred forty-seven million, seventy-one thousand, nine hundred eighty-eight".