216130440 has 64 divisors (see below), whose sum is σ = 662204160. Its totient is φ = 56407040.

The previous prime is 216130433. The next prime is 216130451. The reversal of 216130440 is 44031612.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13521 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (10346940).

Almost surely, 2^216130440 is an apocalyptic number.

216130440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216130440 is an abundant number, since it is smaller than the sum of its proper divisors (446073720).

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

216130440 is a wasteful number, since it uses less digits than its factorization.

216130440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38382 (or 38378 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 216130440 is about 14701.3754458554. The cubic root of 216130440 is about 600.1207534738.

The spelling of 216130440 in words is "two hundred sixteen million, one hundred thirty thousand, four hundred forty".