247115040 has 48 divisors (see below), whose sum is σ = 778413888. Its totient is φ = 65897216.

The previous prime is 247115021. The next prime is 247115041. The reversal of 247115040 is 40511742.

247115040 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 (48).

It is a super-2 number, since 2×247115040² = 122131685988403200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 247115040.

It is not an unprimeable number, because it can be changed into a prime (247115041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256932 + ... + 257891.

It is an arithmetic number, because the mean of its divisors is an integer number (16216956).

Almost surely, 2^247115040 is an apocalyptic number.

247115040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247115040 is an abundant number, since it is smaller than the sum of its proper divisors (531298848).

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

247115040 is a wasteful number, since it uses less digits than its factorization.

247115040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514841 (or 514833 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 247115040 is about 15719.8931294077. The cubic root of 247115040 is about 627.5279290014.

Adding to 247115040 its reverse (40511742), we get a palindrome (287626782).

The spelling of 247115040 in words is "two hundred forty-seven million, one hundred fifteen thousand, forty".