215093928 has 256 divisors, whose sum is σ = 699840000. Its totient is φ = 54792192.

The previous prime is 215093909. The next prime is 215093941. The reversal of 215093928 is 829390512.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4058350 + ... + 4058402.

It is an arithmetic number, because the mean of its divisors is an integer number (2733750).

Almost surely, 2^215093928 is an apocalyptic number.

215093928 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 215093928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349920000).

215093928 is an abundant number, since it is smaller than the sum of its proper divisors (484746072).

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

215093928 is a wasteful number, since it uses less digits than its factorization.

215093928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 215093928 is about 14666.0808670892. The cubic root of 215093928 is about 599.1598686256.

The spelling of 215093928 in words is "two hundred fifteen million, ninety-three thousand, nine hundred twenty-eight".