690048220 has 48 divisors (see below), whose sum is σ = 1502742528. Its totient is φ = 265884480.

The previous prime is 690048211. The next prime is 690048223. The reversal of 690048220 is 22840096.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690048223) 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 15 ways as a sum of consecutive naturals, for example, 138289 + ... + 143191.

It is an arithmetic number, because the mean of its divisors is an integer number (31307136).

Almost surely, 2^690048220 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 690048220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751371264).

690048220 is an abundant number, since it is smaller than the sum of its proper divisors (812694308).

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

690048220 is a wasteful number, since it uses less digits than its factorization.

690048220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5170 (or 5168 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 690048220 is about 26268.7689091057. The cubic root of 690048220 is about 883.6761762404.

The spelling of 690048220 in words is "six hundred ninety million, forty-eight thousand, two hundred twenty".