352222728 has 128 divisors (see below), whose sum is σ = 1095534720. Its totient is φ = 92712960.

The previous prime is 352222699. The next prime is 352222769. The reversal of 352222728 is 827222253.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55326 + ... + 61362.

It is an arithmetic number, because the mean of its divisors is an integer number (8558865).

Almost surely, 2^352222728 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 352222728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547767360).

352222728 is an abundant number, since it is smaller than the sum of its proper divisors (743311992).

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

352222728 is a wasteful number, since it uses less digits than its factorization.

352222728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6087 (or 6083 counting only the distinct ones).

The product of its digits is 26880, while the sum is 33.

The square root of 352222728 is about 18767.5978217778. The cubic root of 352222728 is about 706.2185575268.

It can be divided in two parts, 35222 and 2728, that added together give a triangular number (37950 = T₂₇₅).

The spelling of 352222728 in words is "three hundred fifty-two million, two hundred twenty-two thousand, seven hundred twenty-eight".