247140720 has 120 divisors (see below), whose sum is σ = 860788656. Its totient is φ = 65899008.

The previous prime is 247140701. The next prime is 247140779. The reversal of 247140720 is 27041742.

It is a happy number.

247140720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×247140720² = 122157070964236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13084 + ... + 25796.

Almost surely, 2^247140720 is an apocalyptic number.

247140720 is a gapful number since it is divisible by the number (20) 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 247140720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430394328).

247140720 is an abundant number, since it is smaller than the sum of its proper divisors (613647936).

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

247140720 is a wasteful number, since it uses less digits than its factorization.

247140720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12741 (or 12723 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 247140720 is about 15720.7099076346. The cubic root of 247140720 is about 627.5496656509.

The spelling of 247140720 in words is "two hundred forty-seven million, one hundred forty thousand, seven hundred twenty".