247272240 has 80 divisors (see below), whose sum is σ = 774209376. Its totient is φ = 65286400.

The previous prime is 247272209. The next prime is 247272253. The reversal of 247272240 is 42272742.

247272240 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 (80).

It is a super-2 number, since 2×247272240² = 122287121349235200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 247272198 and 247272207.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2448190 + ... + 2448290.

Almost surely, 2^247272240 is an apocalyptic number.

247272240 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 247272240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387104688).

247272240 is an abundant number, since it is smaller than the sum of its proper divisors (526937136).

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

247272240 is an frugal number, since it uses more digits than its factorization.

247272240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 247272240 is about 15724.8923684711. The cubic root of 247272240 is about 627.6609662027.

247272240 divided by its sum of digits (30) gives a cube (8242408 = 202³).

The spelling of 247272240 in words is "two hundred forty-seven million, two hundred seventy-two thousand, two hundred forty".