216038540 has 24 divisors (see below), whose sum is σ = 473407200. Its totient is φ = 82658048.

The previous prime is 216038513. The next prime is 216038549. The reversal of 216038540 is 45830612.

It is not an unprimeable number, because it can be changed into a prime (216038549) 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 7 ways as a sum of consecutive naturals, for example, 234365 + ... + 235284.

It is an arithmetic number, because the mean of its divisors is an integer number (19725300).

Almost surely, 2^216038540 is an apocalyptic number.

216038540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216038540 is an abundant number, since it is smaller than the sum of its proper divisors (257368660).

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

216038540 is a wasteful number, since it uses less digits than its factorization.

216038540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469681 (or 469679 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 216038540 is about 14698.2495556444. The cubic root of 216038540 is about 600.0356830630.

The spelling of 216038540 in words is "two hundred sixteen million, thirty-eight thousand, five hundred forty".