216960642 has 24 divisors (see below), whose sum is σ = 474649344. Its totient is φ = 71617464.

The previous prime is 216960581. The next prime is 216960697. The reversal of 216960642 is 246069612.

216960642 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 6 + 0 + 642 = 666.

216960642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216960597 and 216960606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56658 + ... + 60365.

It is an arithmetic number, because the mean of its divisors is an integer number (19777056).

Almost surely, 2^216960642 is an apocalyptic number.

216960642 is an abundant number, since it is smaller than the sum of its proper divisors (257688702).

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

216960642 is a wasteful number, since it uses less digits than its factorization.

216960642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117134 (or 117131 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 216960642 is about 14729.5839045100. The cubic root of 216960642 is about 600.8881679474. Note that the first 3 decimals are identical.

The spelling of 216960642 in words is "two hundred sixteen million, nine hundred sixty thousand, six hundred forty-two".