305533242 has 128 divisors (see below), whose sum is σ = 819486720. Its totient is φ = 82494720.

The previous prime is 305533223. The next prime is 305533253. The reversal of 305533242 is 242335503.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 982267 + ... + 982577.

It is an arithmetic number, because the mean of its divisors is an integer number (6402240).

Almost surely, 2^305533242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305533242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409743360).

305533242 is an abundant number, since it is smaller than the sum of its proper divisors (513953478).

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

305533242 is a wasteful number, since it uses less digits than its factorization.

305533242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

The square root of 305533242 is about 17479.5092036361. The cubic root of 305533242 is about 673.5236076863.

Adding to 305533242 its reverse (242335503), we get a palindrome (547868745).

The spelling of 305533242 in words is "three hundred five million, five hundred thirty-three thousand, two hundred forty-two".