245642784 has 24 divisors (see below), whose sum is σ = 644812560. Its totient is φ = 81880896.

The previous prime is 245642777. The next prime is 245642797. The reversal of 245642784 is 487246542.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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 3 ways as a sum of consecutive naturals, for example, 1279294 + ... + 1279485.

It is an arithmetic number, because the mean of its divisors is an integer number (26867190).

Almost surely, 2^245642784 is an apocalyptic number.

245642784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

245642784 is an abundant number, since it is smaller than the sum of its proper divisors (399169776).

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

245642784 is a wasteful number, since it uses less digits than its factorization.

245642784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558792 (or 2558784 counting only the distinct ones).

The product of its digits is 430080, while the sum is 42.

The square root of 245642784 is about 15672.9953742097. The cubic root of 245642784 is about 626.2792223048.

The spelling of 245642784 in words is "two hundred forty-five million, six hundred forty-two thousand, seven hundred eighty-four".