216628632 has 48 divisors (see below), whose sum is σ = 640041480. Its totient is φ = 65644800.

The previous prime is 216628619. The next prime is 216628639. The reversal of 216628632 is 236826612.

216628632 is a `hidden beast` number, since 2 + 16 + 6 + 2 + 8 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216628639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135969 + ... + 137552.

Almost surely, 2^216628632 is an apocalyptic number.

216628632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216628632 is an abundant number, since it is smaller than the sum of its proper divisors (423412848).

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

216628632 is a wasteful number, since it uses less digits than its factorization.

216628632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273544 (or 273537 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 216628632 is about 14718.3094137880. The cubic root of 216628632 is about 600.5815029085.

The spelling of 216628632 in words is "two hundred sixteen million, six hundred twenty-eight thousand, six hundred thirty-two".