248864642 has 8 divisors (see below), whose sum is σ = 402012156. Its totient is φ = 114860592.

The previous prime is 248864633. The next prime is 248864663. The reversal of 248864642 is 246468842.

It can be written as a sum of positive squares in 2 ways, for example, as 175059361 + 73805281 = 13231^2 + 8591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×248864642² = 123867220075576328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 248864593 and 248864602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4785833 + ... + 4785884.

Almost surely, 2^248864642 is an apocalyptic number.

248864642 is a deficient number, since it is larger than the sum of its proper divisors (153147514).

248864642 is a wasteful number, since it uses less digits than its factorization.

248864642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571732.

The product of its digits is 589824, while the sum is 44.

The square root of 248864642 is about 15775.4442726663. Note that the first 3 decimals coincide. The cubic root of 248864642 is about 629.0054367000.

The spelling of 248864642 in words is "two hundred forty-eight million, eight hundred sixty-four thousand, six hundred forty-two".