215420748 has 12 divisors (see below), whose sum is σ = 502648440. Its totient is φ = 71806912.

The previous prime is 215420731. The next prime is 215420749. The reversal of 215420748 is 847024512.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (215420749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8975853 + ... + 8975876.

It is an arithmetic number, because the mean of its divisors is an integer number (41887370).

Almost surely, 2^215420748 is an apocalyptic number.

It is an amenable number.

215420748 is an abundant number, since it is smaller than the sum of its proper divisors (287227692).

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

215420748 is a wasteful number, since it uses less digits than its factorization.

215420748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17951736 (or 17951734 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 215420748 is about 14677.2186738496. The cubic root of 215420748 is about 599.4631753977.

The spelling of 215420748 in words is "two hundred fifteen million, four hundred twenty thousand, seven hundred forty-eight".