247380442 has 16 divisors (see below), whose sum is σ = 376761600. Its totient is φ = 121801680.

The previous prime is 247380407. The next prime is 247380443. The reversal of 247380442 is 244083742.

It is a super-2 number, since 2×247380442² = 122394166168230728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247380398 and 247380407.

It is not an unprimeable number, because it can be changed into a prime (247380443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 64659 + ... + 68377.

It is an arithmetic number, because the mean of its divisors is an integer number (23547600).

Almost surely, 2^247380442 is an apocalyptic number.

247380442 is a deficient number, since it is larger than the sum of its proper divisors (129381158).

247380442 is a wasteful number, since it uses less digits than its factorization.

247380442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 247380442 is about 15728.3324608809. The cubic root of 247380442 is about 627.7525039996.

It can be divided in two parts, 247 and 380442, that added together give a square (380689 = 617²).

The spelling of 247380442 in words is "two hundred forty-seven million, three hundred eighty thousand, four hundred forty-two".