215880834 has 64 divisors (see below), whose sum is σ = 477751680. Its totient is φ = 64627200.

The previous prime is 215880827. The next prime is 215880853. The reversal of 215880834 is 438088512.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 215880792 and 215880801.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527622 + ... + 528030.

It is an arithmetic number, because the mean of its divisors is an integer number (7464870).

Almost surely, 2^215880834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215880834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238875840).

215880834 is an abundant number, since it is smaller than the sum of its proper divisors (261870846).

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

215880834 is a wasteful number, since it uses less digits than its factorization.

215880834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 215880834 is about 14692.8837877389. The cubic root of 215880834 is about 599.8896408138.

The spelling of 215880834 in words is "two hundred fifteen million, eight hundred eighty thousand, eight hundred thirty-four".