248638057 has 4 divisors (see below), whose sum is σ = 250426960. Its totient is φ = 246849156.

The previous prime is 248638031. The next prime is 248638069. The reversal of 248638057 is 750836842.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 248638057 - 2⁷ = 248637929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (248638007) 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, 894243 + ... + 894520.

It is an arithmetic number, because the mean of its divisors is an integer number (62606740).

Almost surely, 2^248638057 is an apocalyptic number.

It is an amenable number.

248638057 is a deficient number, since it is larger than the sum of its proper divisors (1788903).

248638057 is a wasteful number, since it uses less digits than its factorization.

248638057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788902.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 248638057 is about 15768.2610645562. The cubic root of 248638057 is about 628.8144808558.

The spelling of 248638057 in words is "two hundred forty-eight million, six hundred thirty-eight thousand, fifty-seven".