248718639 has 8 divisors (see below), whose sum is σ = 357134512. Its totient is φ = 153057600.

The previous prime is 248718629. The next prime is 248718641. The reversal of 248718639 is 936817842.

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

It is not a de Polignac number, because 248718639 - 2¹³ = 248710447 is a prime.

It is a super-2 number, since 2×248718639² = 123721922772024642, which contains 22 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 (248718629) 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, 3188662 + ... + 3188739.

It is an arithmetic number, because the mean of its divisors is an integer number (44641814).

Almost surely, 2^248718639 is an apocalyptic number.

248718639 is a deficient number, since it is larger than the sum of its proper divisors (108415873).

248718639 is a wasteful number, since it uses less digits than its factorization.

248718639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377417.

The product of its digits is 580608, while the sum is 48.

The square root of 248718639 is about 15770.8160537114. The cubic root of 248718639 is about 628.8824050988.

The spelling of 248718639 in words is "two hundred forty-eight million, seven hundred eighteen thousand, six hundred thirty-nine".