215288448 has 64 divisors (see below), whose sum is σ = 575663520. Its totient is φ = 71285760.

The previous prime is 215288443. The next prime is 215288467. The reversal of 215288448 is 844882512.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (215288443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58503 + ... + 62073.

Almost surely, 2^215288448 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 215288448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287831760).

215288448 is an abundant number, since it is smaller than the sum of its proper divisors (360375072).

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

215288448 is a wasteful number, since it uses less digits than its factorization.

215288448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3733 counting only the distinct ones).

The product of its digits is 163840, while the sum is 42.

The square root of 215288448 is about 14672.7109969494. The cubic root of 215288448 is about 599.3404307686.

The spelling of 215288448 in words is "two hundred fifteen million, two hundred eighty-eight thousand, four hundred forty-eight".