690216688 has 40 divisors (see below), whose sum is σ = 1530200672. Its totient is φ = 295446528.

The previous prime is 690216649. The next prime is 690216691. The reversal of 690216688 is 886612096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101656 + ... + 108232.

Almost surely, 2^690216688 is an apocalyptic number.

It is an amenable number.

690216688 is an abundant number, since it is smaller than the sum of its proper divisors (839983984).

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

690216688 is a wasteful number, since it uses less digits than its factorization.

690216688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529 (or 7523 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 690216688 is about 26271.9753349458. The cubic root of 690216688 is about 883.7480837972.

The spelling of 690216688 in words is "six hundred ninety million, two hundred sixteen thousand, six hundred eighty-eight".