690620680 has 32 divisors (see below), whose sum is σ = 1559966040. Its totient is φ = 275169280.

The previous prime is 690620677. The next prime is 690620681. The reversal of 690620680 is 86026096.

It can be written as a sum of positive squares in 4 ways, for example, as 657512164 + 33108516 = 25642^2 + 5754^2 .

It is not an unprimeable number, because it can be changed into a prime (690620681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23311 + ... + 43870.

Almost surely, 2^690620680 is an apocalyptic number.

It is an amenable number.

690620680 is an abundant number, since it is smaller than the sum of its proper divisors (869345360).

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

690620680 is a wasteful number, since it uses less digits than its factorization.

690620680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67449 (or 67445 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 690620680 is about 26279.6628593291. The cubic root of 690620680 is about 883.9204729069.

The spelling of 690620680 in words is "six hundred ninety million, six hundred twenty thousand, six hundred eighty".