215441408 has 168 divisors, whose sum is σ = 563313072. Its totient is φ = 80216064.

The previous prime is 215441389. The next prime is 215441411. The reversal of 215441408 is 804144512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12673016 + ... + 12673032.

It is an arithmetic number, because the mean of its divisors is an integer number (3353054).

Almost surely, 2^215441408 is an apocalyptic number.

215441408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215441408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281656536).

215441408 is an abundant number, since it is smaller than the sum of its proper divisors (347871664).

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

215441408 is an equidigital number, since it uses as much as digits as its factorization.

215441408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 215441408 is about 14677.9224687965. The cubic root of 215441408 is about 599.4823386916.

The spelling of 215441408 in words is "two hundred fifteen million, four hundred forty-one thousand, four hundred eight".