247247988 has 48 divisors (see below), whose sum is σ = 653997120. Its totient is φ = 72071424.

The previous prime is 247247981. The next prime is 247247993. The reversal of 247247988 is 889742742.

247247988 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247247988² = 122263135140096288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247247988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247247981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38745 + ... + 44672.

It is an arithmetic number, because the mean of its divisors is an integer number (13624940).

Almost surely, 2^247247988 is an apocalyptic number.

It is an amenable number.

247247988 is an abundant number, since it is smaller than the sum of its proper divisors (406749132).

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

247247988 is a wasteful number, since it uses less digits than its factorization.

247247988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83456 (or 83454 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 247247988 is about 15724.1212155084. The cubic root of 247247988 is about 627.6404455929.

The spelling of 247247988 in words is "two hundred forty-seven million, two hundred forty-seven thousand, nine hundred eighty-eight".