690390810 has 64 divisors (see below), whose sum is σ = 1847260800. Its totient is φ = 183482496.

The previous prime is 690390787. The next prime is 690390817. The reversal of 690390810 is 18093096.

690390810 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690390810² = 953278941064912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690390817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78726 + ... + 87054.

It is an arithmetic number, because the mean of its divisors is an integer number (28863450).

Almost surely, 2^690390810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690390810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923630400).

690390810 is an abundant number, since it is smaller than the sum of its proper divisors (1156869990).

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

690390810 is a wasteful number, since it uses less digits than its factorization.

690390810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8652 (or 8646 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 690390810 is about 26275.2889613035. The cubic root of 690390810 is about 883.8223923674.

The spelling of 690390810 in words is "six hundred ninety million, three hundred ninety thousand, eight hundred ten".