215728948 has 12 divisors (see below), whose sum is σ = 377892900. Its totient is φ = 107759552.

The previous prime is 215728927. The next prime is 215728967. The reversal of 215728948 is 849827512.

It can be written as a sum of positive squares in 2 ways, for example, as 141562404 + 74166544 = 11898^2 + 8612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215728898 and 215728907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21511 + ... + 29902.

It is an arithmetic number, because the mean of its divisors is an integer number (31491075).

Almost surely, 2^215728948 is an apocalyptic number.

It is an amenable number.

215728948 is a deficient number, since it is larger than the sum of its proper divisors (162163952).

215728948 is a wasteful number, since it uses less digits than its factorization.

215728948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52466 (or 52464 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 215728948 is about 14687.7141856723. The cubic root of 215728948 is about 599.7489208727.

The spelling of 215728948 in words is "two hundred fifteen million, seven hundred twenty-eight thousand, nine hundred forty-eight".