216007988 has 12 divisors (see below), whose sum is σ = 432016032. Its totient is φ = 92574840.

The previous prime is 216007951. The next prime is 216007991. The reversal of 216007988 is 889700612.

216007988 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3857258 + ... + 3857313.

It is an arithmetic number, because the mean of its divisors is an integer number (36001336).

Almost surely, 2^216007988 is an apocalyptic number.

216007988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216007988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216007988 is a wasteful number, since it uses less digits than its factorization.

216007988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714582 (or 7714580 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 216007988 is about 14697.2102114653. The cubic root of 216007988 is about 600.0073962051.

The spelling of 216007988 in words is "two hundred sixteen million, seven thousand, nine hundred eighty-eight".