245236138 has 16 divisors (see below), whose sum is σ = 430182720. Its totient is φ = 102656736.

The previous prime is 245236087. The next prime is 245236163. The reversal of 245236138 is 831632542.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203083 + ... + 204286.

It is an arithmetic number, because the mean of its divisors is an integer number (26886420).

Almost surely, 2^245236138 is an apocalyptic number.

245236138 is a deficient number, since it is larger than the sum of its proper divisors (184946582).

245236138 is a wasteful number, since it uses less digits than its factorization.

245236138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407421.

The product of its digits is 34560, while the sum is 34.

The square root of 245236138 is about 15660.0171775129. The cubic root of 245236138 is about 625.9334429607.

The spelling of 245236138 in words is "two hundred forty-five million, two hundred thirty-six thousand, one hundred thirty-eight".