215089240 has 16 divisors (see below), whose sum is σ = 483950880. Its totient is φ = 86035680.

The previous prime is 215089207. The next prime is 215089243. The reversal of 215089240 is 42980512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215089243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2688576 + ... + 2688655.

It is an arithmetic number, because the mean of its divisors is an integer number (30246930).

Almost surely, 2^215089240 is an apocalyptic number.

215089240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215089240 is an abundant number, since it is smaller than the sum of its proper divisors (268861640).

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

215089240 is a wasteful number, since it uses less digits than its factorization.

215089240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377242 (or 5377238 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 215089240 is about 14665.9210416530. The cubic root of 215089240 is about 599.1555156717.

The spelling of 215089240 in words is "two hundred fifteen million, eighty-nine thousand, two hundred forty".