347221872 has 240 divisors, whose sum is σ = 1095063840. Its totient is φ = 102187008.

The previous prime is 347221871. The next prime is 347221883. The reversal of 347221872 is 278122743.

347221872 is a `hidden beast` number, since 3 + 472 + 2 + 187 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347221871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4756428 + ... + 4756500.

It is an arithmetic number, because the mean of its divisors is an integer number (4562766).

Almost surely, 2^347221872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 347221872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547531920).

347221872 is an abundant number, since it is smaller than the sum of its proper divisors (747841968).

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

347221872 is a wasteful number, since it uses less digits than its factorization.

347221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 191 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 347221872 is about 18633.8904150475. The cubic root of 347221872 is about 702.8603181070.

The spelling of 347221872 in words is "three hundred forty-seven million, two hundred twenty-one thousand, eight hundred seventy-two".