247905395220 has 144 divisors (see below), whose sum is σ = 849961546560. Its totient is φ = 53681757696.

The previous prime is 247905395159. The next prime is 247905395237. The reversal of 247905395220 is 22593509742.

It is a super-2 number, since 2×247905395220² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247905395220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2163129 + ... + 2274848.

It is an arithmetic number, because the mean of its divisors is an integer number (5902510740).

Almost surely, 2^247905395220 is an apocalyptic number.

247905395220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247905395220 is an abundant number, since it is smaller than the sum of its proper divisors (602056151340).

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

247905395220 is a wasteful number, since it uses less digits than its factorization.

247905395220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438022 (or 4438013 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 48.

The spelling of 247905395220 in words is "two hundred forty-seven billion, nine hundred five million, three hundred ninety-five thousand, two hundred twenty".