248139810 has 144 divisors (see below), whose sum is σ = 706380480. Its totient is φ = 60264000.

The previous prime is 248139809. The next prime is 248139833. The reversal of 248139810 is 18931842.

It is a super-2 number, since 2×248139810² = 123146730613672200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1643235 + ... + 1643385.

It is an arithmetic number, because the mean of its divisors is an integer number (4905420).

Almost surely, 2^248139810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 248139810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353190240).

248139810 is an abundant number, since it is smaller than the sum of its proper divisors (458240670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

248139810 is a wasteful number, since it uses less digits than its factorization.

248139810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 248139810 is about 15752.4540945213. The cubic root of 248139810 is about 628.3941718553.

The spelling of 248139810 in words is "two hundred forty-eight million, one hundred thirty-nine thousand, eight hundred ten".