247245820 has 12 divisors (see below), whose sum is σ = 519216264. Its totient is φ = 98898320.

The previous prime is 247245811. The next prime is 247245847. The reversal of 247245820 is 28542742.

It is a super-2 number, since 2×247245820² = 122260991014944800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6181126 + ... + 6181165.

It is an arithmetic number, because the mean of its divisors is an integer number (43268022).

Almost surely, 2^247245820 is an apocalyptic number.

247245820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247245820 is an abundant number, since it is smaller than the sum of its proper divisors (271970444).

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

247245820 is a wasteful number, since it uses less digits than its factorization.

247245820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12362300 (or 12362298 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 247245820 is about 15724.0522766875. The cubic root of 247245820 is about 627.6386110940.

The spelling of 247245820 in words is "two hundred forty-seven million, two hundred forty-five thousand, eight hundred twenty".