690459822 has 64 divisors (see below), whose sum is σ = 1656264960. Its totient is φ = 211950432.

The previous prime is 690459799. The next prime is 690459823. The reversal of 690459822 is 228954096.

690459822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690459823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394353 + ... + 396099.

It is an arithmetic number, because the mean of its divisors is an integer number (25879140).

Almost surely, 2^690459822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690459822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828132480).

690459822 is an abundant number, since it is smaller than the sum of its proper divisors (965805138).

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

690459822 is a wasteful number, since it uses less digits than its factorization.

690459822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 690459822 is about 26276.6021776028. The cubic root of 690459822 is about 883.8518405765.

The spelling of 690459822 in words is "six hundred ninety million, four hundred fifty-nine thousand, eight hundred twenty-two".