247886420 has 12 divisors (see below), whose sum is σ = 520561524. Its totient is φ = 99154560.

The previous prime is 247886417. The next prime is 247886467. The reversal of 247886420 is 24688742.

247886420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 59043856 + 188842564 = 7684^2 + 13742^2 .

It is a super-2 number, since 2×247886420² = 122895354440832800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6197141 + ... + 6197180.

It is an arithmetic number, because the mean of its divisors is an integer number (43380127).

Almost surely, 2^247886420 is an apocalyptic number.

247886420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247886420 is an abundant number, since it is smaller than the sum of its proper divisors (272675104).

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

247886420 is a wasteful number, since it uses less digits than its factorization.

247886420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12394330 (or 12394328 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 247886420 is about 15744.4091664311. The cubic root of 247886420 is about 628.1802023875.

The spelling of 247886420 in words is "two hundred forty-seven million, eight hundred eighty-six thousand, four hundred twenty".