245694820 has 36 divisors (see below), whose sum is σ = 600199740. Its totient is φ = 84237888.

The previous prime is 245694817. The next prime is 245694853. The reversal of 245694820 is 28496542.

It can be written as a sum of positive squares in 2 ways, for example, as 150749284 + 94945536 = 12278^2 + 9744^2 .

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 11 ways as a sum of consecutive naturals, for example, 124375 + ... + 126334.

It is an arithmetic number, because the mean of its divisors is an integer number (16672215).

Almost surely, 2^245694820 is an apocalyptic number.

245694820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245694820 is an abundant number, since it is smaller than the sum of its proper divisors (354504920).

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

245694820 is a wasteful number, since it uses less digits than its factorization.

245694820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250732 (or 250723 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 245694820 is about 15674.6553391135. The cubic root of 245694820 is about 626.3234420239.

The spelling of 245694820 in words is "two hundred forty-five million, six hundred ninety-four thousand, eight hundred twenty".