245420660 has 24 divisors (see below), whose sum is σ = 516122880. Its totient is φ = 98027424.

The previous prime is 245420627. The next prime is 245420717. The reversal of 245420660 is 66024542.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 6101 + ... + 22979.

It is an arithmetic number, because the mean of its divisors is an integer number (21505120).

Almost surely, 2^245420660 is an apocalyptic number.

245420660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245420660 is an abundant number, since it is smaller than the sum of its proper divisors (270702220).

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

245420660 is a wasteful number, since it uses less digits than its factorization.

245420660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17615 (or 17613 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 245420660 is about 15665.9075702622. The cubic root of 245420660 is about 626.0903930957.

The spelling of 245420660 in words is "two hundred forty-five million, four hundred twenty thousand, six hundred sixty".