247404152 has 8 divisors (see below), whose sum is σ = 463882800. Its totient is φ = 123702072.

The previous prime is 247404139. The next prime is 247404161. The reversal of 247404152 is 251404742.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×247404152² = 122417628853678208, which 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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15462752 + ... + 15462767.

It is an arithmetic number, because the mean of its divisors is an integer number (57985350).

Almost surely, 2^247404152 is an apocalyptic number.

It is an amenable number.

247404152 is a deficient number, since it is larger than the sum of its proper divisors (216478648).

247404152 is a wasteful number, since it uses less digits than its factorization.

247404152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30925525 (or 30925521 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 247404152 is about 15729.0861781605. The cubic root of 247404152 is about 627.7725588542.

Adding to 247404152 its reverse (251404742), we get a palindrome (498808894).

The spelling of 247404152 in words is "two hundred forty-seven million, four hundred four thousand, one hundred fifty-two".