690989008 has 20 divisors (see below), whose sum is σ = 1381979008. Its totient is φ = 334349280.

The previous prime is 690988957. The next prime is 690989009. The reversal of 690989008 is 800989096.

690989008 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690989009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696066 + ... + 697057.

Almost surely, 2^690989008 is an apocalyptic number.

It is an amenable number.

690989008 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

690989008 is a wasteful number, since it uses less digits than its factorization.

690989008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393162 (or 1393156 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 690989008 is about 26286.6697776649. The cubic root of 690989008 is about 884.0775851044.

The spelling of 690989008 in words is "six hundred ninety million, nine hundred eighty-nine thousand, eight".