215748040 has 96 divisors (see below), whose sum is σ = 522305280. Its totient is φ = 80175744.

The previous prime is 215748017. The next prime is 215748041. The reversal of 215748040 is 40847512.

It is a junction number, because it is equal to n+sod(n) for n = 215747993 and 215748011.

It is not an unprimeable number, because it can be changed into a prime (215748041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 967369 + ... + 967591.

It is an arithmetic number, because the mean of its divisors is an integer number (5440680).

Almost surely, 2^215748040 is an apocalyptic number.

215748040 is a gapful number since it is divisible by the number (20) 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 215748040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261152640).

215748040 is an abundant number, since it is smaller than the sum of its proper divisors (306557240).

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

215748040 is a wasteful number, since it uses less digits than its factorization.

215748040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 215748040 is about 14688.3641022409. The cubic root of 215748040 is about 599.7666129329.

The spelling of 215748040 in words is "two hundred fifteen million, seven hundred forty-eight thousand, forty".