245705538 has 32 divisors (see below), whose sum is σ = 542126592. Its totient is φ = 73756800.

The previous prime is 245705507. The next prime is 245705591. The reversal of 245705538 is 835507542.

It is a super-2 number, since 2×245705538² = 120742422807738888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 245705496 and 245705505.

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 15 ways as a sum of consecutive naturals, for example, 35218 + ... + 41613.

It is an arithmetic number, because the mean of its divisors is an integer number (16941456).

Almost surely, 2^245705538 is an apocalyptic number.

245705538 is an abundant number, since it is smaller than the sum of its proper divisors (296421054).

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

245705538 is a wasteful number, since it uses less digits than its factorization.

245705538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76890.

The product of its (nonzero) digits is 168000, while the sum is 39.

The square root of 245705538 is about 15674.9972248801. The cubic root of 245705538 is about 626.3325493073.

The spelling of 245705538 in words is "two hundred forty-five million, seven hundred five thousand, five hundred thirty-eight".