239249820 has 48 divisors (see below), whose sum is σ = 671519520. Its totient is φ = 63645696.

The previous prime is 239249819. The next prime is 239249837. The reversal of 239249820 is 28942932.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 21376 + ... + 30584.

It is an arithmetic number, because the mean of its divisors is an integer number (13989990).

Almost surely, 2^239249820 is an apocalyptic number.

239249820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239249820 is an abundant number, since it is smaller than the sum of its proper divisors (432269700).

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

239249820 is a wasteful number, since it uses less digits than its factorization.

239249820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9654 (or 9652 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 239249820 is about 15467.7024796833. The cubic root of 239249820 is about 620.7983299134.

The spelling of 239249820 in words is "two hundred thirty-nine million, two hundred forty-nine thousand, eight hundred twenty".