247064664 has 192 divisors, whose sum is σ = 797817600. Its totient is φ = 63033600.

The previous prime is 247064663. The next prime is 247064681. The reversal of 247064664 is 466460742.

It is a super-2 number, since 2×247064664² = 122081896394865792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247064663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 918322 + ... + 918590.

It is an arithmetic number, because the mean of its divisors is an integer number (4155300).

Almost surely, 2^247064664 is an apocalyptic number.

247064664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247064664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398908800).

247064664 is an abundant number, since it is smaller than the sum of its proper divisors (550752936).

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

247064664 is a wasteful number, since it uses less digits than its factorization.

247064664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

The square root of 247064664 is about 15718.2907467701. The cubic root of 247064664 is about 627.4852842271.

The spelling of 247064664 in words is "two hundred forty-seven million, sixty-four thousand, six hundred sixty-four".