1257868238 has 16 divisors (see below), whose sum is σ = 2102125824. Its totient is φ = 559592760.

The previous prime is 1257868231. The next prime is 1257868277. The reversal of 1257868238 is 8328687521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257868231) 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, 607220 + ... + 609287.

It is an arithmetic number, because the mean of its divisors is an integer number (131382864).

Almost surely, 2^1257868238 is an apocalyptic number.

1257868238 is a deficient number, since it is larger than the sum of its proper divisors (844257586).

1257868238 is a wasteful number, since it uses less digits than its factorization.

1257868238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216567.

The product of its digits is 1290240, while the sum is 50.

The square root of 1257868238 is about 35466.4381916200. The cubic root of 1257868238 is about 1079.4728331432.

The spelling of 1257868238 in words is "one billion, two hundred fifty-seven million, eight hundred sixty-eight thousand, two hundred thirty-eight".