245155844 has 12 divisors (see below), whose sum is σ = 454259484. Its totient is φ = 115367424.

The previous prime is 245155831. The next prime is 245155849. The reversal of 245155844 is 448551542.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92929600 + 152226244 = 9640^2 + 12338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 245155798 and 245155807.

It is not an unprimeable number, because it can be changed into a prime (245155849) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1802549 + ... + 1802684.

It is an arithmetic number, because the mean of its divisors is an integer number (37854957).

Almost surely, 2^245155844 is an apocalyptic number.

It is an amenable number.

245155844 is a deficient number, since it is larger than the sum of its proper divisors (209103640).

245155844 is a wasteful number, since it uses less digits than its factorization.

245155844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605254 (or 3605252 counting only the distinct ones).

The product of its digits is 128000, while the sum is 38.

The square root of 245155844 is about 15657.4533050557. The cubic root of 245155844 is about 625.8651221626.

The spelling of 245155844 in words is "two hundred forty-five million, one hundred fifty-five thousand, eight hundred forty-four".