248528139 has 8 divisors (see below), whose sum is σ = 335094480. Its totient is φ = 163823616.

The previous prime is 248528131. The next prime is 248528191. The reversal of 248528139 is 931825842.

248528139 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 not a de Polignac number, because 248528139 - 2³ = 248528131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 248528139.

It is not an unprimeable number, because it can be changed into a prime (248528131) 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, 465142 + ... + 465675.

It is an arithmetic number, because the mean of its divisors is an integer number (41886810).

Almost surely, 2^248528139 is an apocalyptic number.

248528139 is a deficient number, since it is larger than the sum of its proper divisors (86566341).

248528139 is an equidigital number, since it uses as much as digits as its factorization.

248528139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930909.

The product of its digits is 138240, while the sum is 42.

The square root of 248528139 is about 15764.7752600537. The cubic root of 248528139 is about 628.7218050219.

The spelling of 248528139 in words is "two hundred forty-eight million, five hundred twenty-eight thousand, one hundred thirty-nine".