690428672 has 54 divisors (see below), whose sum is σ = 1397047428. Its totient is φ = 340540416.

The previous prime is 690428653. The next prime is 690428677. The reversal of 690428672 is 276824096.

It is a super-2 number, since 2×690428672² = 953383502239367168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690428677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3041423 + ... + 3041649.

Almost surely, 2^690428672 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 690428672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698523714).

690428672 is an abundant number, since it is smaller than the sum of its proper divisors (706618756).

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

690428672 is an equidigital number, since it uses as much as digits as its factorization.

690428672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 690428672 is about 26276.0094382690. The cubic root of 690428672 is about 883.8385487585.

The spelling of 690428672 in words is "six hundred ninety million, four hundred twenty-eight thousand, six hundred seventy-two".