248643538 has 32 divisors (see below), whose sum is σ = 461240640. Its totient is φ = 98832960.

The previous prime is 248643533. The next prime is 248643541. The reversal of 248643538 is 835346842.

It is a junction number, because it is equal to n+sod(n) for n = 248643494 and 248643503.

It is not an unprimeable number, because it can be changed into a prime (248643533) 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 15 ways as a sum of consecutive naturals, for example, 17445 + ... + 28312.

It is an arithmetic number, because the mean of its divisors is an integer number (14413770).

Almost surely, 2^248643538 is an apocalyptic number.

248643538 is a deficient number, since it is larger than the sum of its proper divisors (212597102).

248643538 is a wasteful number, since it uses less digits than its factorization.

248643538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45802.

The product of its digits is 552960, while the sum is 43.

The square root of 248643538 is about 15768.4348620908. The cubic root of 248643538 is about 628.8191013698.

The spelling of 248643538 in words is "two hundred forty-eight million, six hundred forty-three thousand, five hundred thirty-eight".