215354028 has 48 divisors (see below), whose sum is σ = 534933504. Its totient is φ = 67196160.

The previous prime is 215353997. The next prime is 215354039. The reversal of 215354028 is 820453512.

It is a junction number, because it is equal to n+sod(n) for n = 215353986 and 215354004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36201 + ... + 41727.

It is an arithmetic number, because the mean of its divisors is an integer number (11144448).

Almost surely, 2^215354028 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 215354028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267466752).

215354028 is an abundant number, since it is smaller than the sum of its proper divisors (319579476).

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

215354028 is a wasteful number, since it uses less digits than its factorization.

215354028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742 (or 5740 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 215354028 is about 14674.9455876334. The cubic root of 215354028 is about 599.4012805348.

The spelling of 215354028 in words is "two hundred fifteen million, three hundred fifty-four thousand, twenty-eight".