215990748 has 18 divisors (see below), whose sum is σ = 545976704. Its totient is φ = 71996904.

The previous prime is 215990743. The next prime is 215990791. The reversal of 215990748 is 847099512.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215990743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2999836 + ... + 2999907.

Almost surely, 2^215990748 is an apocalyptic number.

It is an amenable number.

215990748 is an abundant number, since it is smaller than the sum of its proper divisors (329985956).

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

215990748 is a wasteful number, since it uses less digits than its factorization.

215990748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999753 (or 5999748 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 215990748 is about 14696.6236938965. The cubic root of 215990748 is about 599.9914332110.

The spelling of 215990748 in words is "two hundred fifteen million, nine hundred ninety thousand, seven hundred forty-eight".