247932240 has 80 divisors (see below), whose sum is σ = 771158976. Its totient is φ = 65894400.

The previous prime is 247932211. The next prime is 247932253. The reversal of 247932240 is 42239742.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×247932240² = 122940791262835200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77880 + ... + 81000.

Almost surely, 2^247932240 is an apocalyptic number.

247932240 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 247932240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385579488).

247932240 is an abundant number, since it is smaller than the sum of its proper divisors (523226736).

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

247932240 is a wasteful number, since it uses less digits than its factorization.

247932240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468 (or 3462 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 247932240 is about 15745.8642188989. The cubic root of 247932240 is about 628.2189048486.

The spelling of 247932240 in words is "two hundred forty-seven million, nine hundred thirty-two thousand, two hundred forty".