247385052 has 18 divisors (see below), whose sum is σ = 625334528. Its totient is φ = 82461672.

The previous prime is 247385041. The next prime is 247385093. The reversal of 247385052 is 250583742.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×247385052² = 122398727906085408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6871807 = 247385052 / (2 + 4 + 7 + 3 + 8 + 5 + 0 + 5 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 247384998 and 247385016.

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 5 ways as a sum of consecutive naturals, for example, 3435868 + ... + 3435939.

Almost surely, 2^247385052 is an apocalyptic number.

It is an amenable number.

247385052 is an abundant number, since it is smaller than the sum of its proper divisors (377949476).

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

247385052 is a wasteful number, since it uses less digits than its factorization.

247385052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6871817 (or 6871812 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 247385052 is about 15728.4790110169. The cubic root of 247385052 is about 627.7564034200.

The spelling of 247385052 in words is "two hundred forty-seven million, three hundred eighty-five thousand, fifty-two".