215895648 has 96 divisors (see below), whose sum is σ = 603542016. Its totient is φ = 67340288.

The previous prime is 215895599. The next prime is 215895679. The reversal of 215895648 is 846598512.

215895648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×215895648² = 93221861650679808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 215895597 and 215895606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428965 + ... + 429467.

It is an arithmetic number, because the mean of its divisors is an integer number (6286896).

Almost surely, 2^215895648 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 215895648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301771008).

215895648 is an abundant number, since it is smaller than the sum of its proper divisors (387646368).

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

215895648 is a wasteful number, since it uses less digits than its factorization.

215895648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 788 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 215895648 is about 14693.3879006851. The cubic root of 215895648 is about 599.9033622138.

The spelling of 215895648 in words is "two hundred fifteen million, eight hundred ninety-five thousand, six hundred forty-eight".