248938639 has 8 divisors (see below), whose sum is σ = 260075520. Its totient is φ = 237972000.

The previous prime is 248938631. The next prime is 248938673. The reversal of 248938639 is 936839842.

248938639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 248938639 - 2³ = 248938631 is a prime.

It is a super-3 number, since 3×248938639³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248938631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39567 + ... + 45424.

It is an arithmetic number, because the mean of its divisors is an integer number (32509440).

Almost surely, 2^248938639 is an apocalyptic number.

248938639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

248938639 is a deficient number, since it is larger than the sum of its proper divisors (11136881).

248938639 is a wasteful number, since it uses less digits than its factorization.

248938639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85121.

The product of its digits is 2239488, while the sum is 52.

The square root of 248938639 is about 15777.7894205747. The cubic root of 248938639 is about 629.0677729999.

The spelling of 248938639 in words is "two hundred forty-eight million, nine hundred thirty-eight thousand, six hundred thirty-nine".