257378038 has 4 divisors (see below), whose sum is σ = 386067060. Its totient is φ = 128689018.

The previous prime is 257377999. The next prime is 257378041. The reversal of 257378038 is 830873752.

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

It is a junction number, because it is equal to n+sod(n) for n = 257377985 and 257378003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64344508 + ... + 64344511.

It is an arithmetic number, because the mean of its divisors is an integer number (96516765).

Almost surely, 2^257378038 is an apocalyptic number.

257378038 is a deficient number, since it is larger than the sum of its proper divisors (128689022).

257378038 is a wasteful number, since it uses less digits than its factorization.

257378038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128689021.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 257378038 is about 16043.0058904184. The cubic root of 257378038 is about 636.0977049504.

The spelling of 257378038 in words is "two hundred fifty-seven million, three hundred seventy-eight thousand, thirty-eight".