347426820 has 288 divisors, whose sum is σ = 1210083840. Its totient is φ = 83700864.

The previous prime is 347426813. The next prime is 347426851. The reversal of 347426820 is 28624743.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7392037 + ... + 7392083.

It is an arithmetic number, because the mean of its divisors is an integer number (4201680).

Almost surely, 2^347426820 is an apocalyptic number.

347426820 is a gapful number since it is divisible by the number (30) 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 347426820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605041920).

347426820 is an abundant number, since it is smaller than the sum of its proper divisors (862657020).

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

347426820 is a wasteful number, since it uses less digits than its factorization.

347426820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 347426820 is about 18639.3889384819. The cubic root of 347426820 is about 702.9985788710.

The spelling of 347426820 in words is "three hundred forty-seven million, four hundred twenty-six thousand, eight hundred twenty".