215068440 has 32 divisors (see below), whose sum is σ = 645205680. Its totient is φ = 57351552.

The previous prime is 215068409. The next prime is 215068463. The reversal of 215068440 is 44860512.

215068440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 215068398 and 215068407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895999 + ... + 896238.

Almost surely, 2^215068440 is an apocalyptic number.

215068440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215068440 is an abundant number, since it is smaller than the sum of its proper divisors (430137240).

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

215068440 is a wasteful number, since it uses less digits than its factorization.

215068440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792251 (or 1792247 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 215068440 is about 14665.2118975486. The cubic root of 215068440 is about 599.1362014614.

The spelling of 215068440 in words is "two hundred fifteen million, sixty-eight thousand, four hundred forty".