690814220 has 72 divisors (see below), whose sum is σ = 1527371664. Its totient is φ = 262386432.

The previous prime is 690814183. The next prime is 690814231. The reversal of 690814220 is 22418096.

690814220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1126634 + ... + 1127246.

Almost surely, 2^690814220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690814220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763685832).

690814220 is an abundant number, since it is smaller than the sum of its proper divisors (836557444).

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

690814220 is a wasteful number, since it uses less digits than its factorization.

690814220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 690814220 is about 26283.3449165056. The cubic root of 690814220 is about 884.0030353492.

The spelling of 690814220 in words is "six hundred ninety million, eight hundred fourteen thousand, two hundred twenty".