347228399826 has 144 divisors (see below), whose sum is σ = 972732017088. Its totient is φ = 88487380800.

The previous prime is 347228399759. The next prime is 347228399923. The reversal of 347228399826 is 628993822743.

347228399826 is a `hidden beast` number, since 3 + 472 + 2 + 83 + 9 + 9 + 82 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 176571 + ... + 851841.

It is an arithmetic number, because the mean of its divisors is an integer number (6755083452).

Almost surely, 2^347228399826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 347228399826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486366008544).

347228399826 is an abundant number, since it is smaller than the sum of its proper divisors (625503617262).

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

347228399826 is a wasteful number, since it uses less digits than its factorization.

347228399826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675357 (or 675347 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 347228399826 in words is "three hundred forty-seven billion, two hundred twenty-eight million, three hundred ninety-nine thousand, eight hundred twenty-six".