245138178 has 16 divisors (see below), whose sum is σ = 492818976. Its totient is φ = 81288960.

The previous prime is 245138149. The next prime is 245138191. The reversal of 245138178 is 871831542.

It is a super-4 number, since 4×245138178⁴ (a number of 35 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104688 + ... + 107003.

It is an arithmetic number, because the mean of its divisors is an integer number (30801186).

Almost surely, 2^245138178 is an apocalyptic number.

245138178 is an abundant number, since it is smaller than the sum of its proper divisors (247680798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245138178 is a wasteful number, since it uses less digits than its factorization.

245138178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211889.

The product of its digits is 53760, while the sum is 39.

The square root of 245138178 is about 15656.8891546182. The cubic root of 245138178 is about 625.8500884618.

The spelling of 245138178 in words is "two hundred forty-five million, one hundred thirty-eight thousand, one hundred seventy-eight".