690669228 has 48 divisors (see below), whose sum is σ = 1716865920. Its totient is φ = 215472384.

The previous prime is 690669227. The next prime is 690669229. The reversal of 690669228 is 822966096.

It is an interprime number because it is at equal distance from previous prime (690669227) and next prime (690669229).

It is a super-2 number, since 2×690669228² = 954047965012231968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690669223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676 + ... + 37172.

It is an arithmetic number, because the mean of its divisors is an integer number (35768040).

Almost surely, 2^690669228 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 690669228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858432960).

690669228 is an abundant number, since it is smaller than the sum of its proper divisors (1026196692).

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

690669228 is a wasteful number, since it uses less digits than its factorization.

690669228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36606 (or 36604 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 690669228 is about 26280.5865231353. The cubic root of 690669228 is about 883.9411845010.

The spelling of 690669228 in words is "six hundred ninety million, six hundred sixty-nine thousand, two hundred twenty-eight".