248648405 has 4 divisors (see below), whose sum is σ = 298378092. Its totient is φ = 198918720.

The previous prime is 248648401. The next prime is 248648417. The reversal of 248648405 is 504846842.

248648405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48539089 + 200109316 = 6967^2 + 14146^2 .

It is not a de Polignac number, because 248648405 - 2² = 248648401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248648401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24864836 + ... + 24864845.

It is an arithmetic number, because the mean of its divisors is an integer number (74594523).

Almost surely, 2^248648405 is an apocalyptic number.

It is an amenable number.

248648405 is a deficient number, since it is larger than the sum of its proper divisors (49729687).

248648405 is an equidigital number, since it uses as much as digits as its factorization.

248648405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49729686.

The product of its (nonzero) digits is 245760, while the sum is 41.

The square root of 248648405 is about 15768.5891886370. The cubic root of 248648405 is about 628.8232042214.

The spelling of 248648405 in words is "two hundred forty-eight million, six hundred forty-eight thousand, four hundred five".