247668486 has 48 divisors (see below), whose sum is σ = 553743360. Its totient is φ = 73738080.

The previous prime is 247668481. The next prime is 247668503. The reversal of 247668486 is 684866742.

247668486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247668486² = 122679357915064392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247668481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27495 + ... + 35373.

It is an arithmetic number, because the mean of its divisors is an integer number (11536320).

Almost surely, 2^247668486 is an apocalyptic number.

247668486 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 247668486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276871680).

247668486 is an abundant number, since it is smaller than the sum of its proper divisors (306074874).

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

247668486 is a wasteful number, since it uses less digits than its factorization.

247668486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7941 (or 7928 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 51.

The square root of 247668486 is about 15737.4866481278. The cubic root of 247668486 is about 627.9960562723.

The spelling of 247668486 in words is "two hundred forty-seven million, six hundred sixty-eight thousand, four hundred eighty-six".