216400630 has 8 divisors (see below), whose sum is σ = 389521152. Its totient is φ = 86560248.

The previous prime is 216400619. The next prime is 216400637. The reversal of 216400630 is 36004612.

216400630 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216400637) 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, 10820022 + ... + 10820041.

It is an arithmetic number, because the mean of its divisors is an integer number (48690144).

Almost surely, 2^216400630 is an apocalyptic number.

216400630 is a deficient number, since it is larger than the sum of its proper divisors (173120522).

216400630 is a wasteful number, since it uses less digits than its factorization.

216400630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640070.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 216400630 is about 14710.5618519484. The cubic root of 216400630 is about 600.3707245953.

The spelling of 216400630 in words is "two hundred sixteen million, four hundred thousand, six hundred thirty".