215846428 has 48 divisors (see below), whose sum is σ = 449075200. Its totient is φ = 88827840.

The previous prime is 215846417. The next prime is 215846429. The reversal of 215846428 is 824648512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215846429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119758 + ... + 121546.

Almost surely, 2^215846428 is an apocalyptic number.

215846428 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 215846428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224537600).

215846428 is an abundant number, since it is smaller than the sum of its proper divisors (233228772).

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

215846428 is a wasteful number, since it uses less digits than its factorization.

215846428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1968 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 215846428 is about 14691.7129021772. The cubic root of 215846428 is about 599.8577699907.

The spelling of 215846428 in words is "two hundred fifteen million, eight hundred forty-six thousand, four hundred twenty-eight".