247673340 has 144 divisors (see below), whose sum is σ = 823193280. Its totient is φ = 59996160.

The previous prime is 247673317. The next prime is 247673381. The reversal of 247673340 is 43376742.

It is a happy number.

247673340 is a `hidden beast` number, since 247 + 6 + 73 + 340 = 666.

It is a super-2 number, since 2×247673340² = 122684166693511200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 247673295 and 247673304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87345 + ... + 90135.

It is an arithmetic number, because the mean of its divisors is an integer number (5716620).

Almost surely, 2^247673340 is an apocalyptic number.

247673340 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 247673340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411596640).

247673340 is an abundant number, since it is smaller than the sum of its proper divisors (575519940).

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

247673340 is a wasteful number, since it uses less digits than its factorization.

247673340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852 (or 2847 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 36.

The square root of 247673340 is about 15737.6408651360. The cubic root of 247673340 is about 628.0001588975. Note that the first 3 decimals are identical.

The spelling of 247673340 in words is "two hundred forty-seven million, six hundred seventy-three thousand, three hundred forty".