690899472 has 30 divisors (see below), whose sum is σ = 1933559342. Its totient is φ = 230299776.

The previous prime is 690899471. The next prime is 690899491. The reversal of 690899472 is 274998096.

690899472 is a `hidden beast` number, since 6 + 90 + 89 + 9 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 444535056 + 246364416 = 21084^2 + 15696^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (690899471) 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, 2398813 + ... + 2399100.

Almost surely, 2^690899472 is an apocalyptic number.

It is an amenable number.

690899472 is an abundant number, since it is smaller than the sum of its proper divisors (1242659870).

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

690899472 is a wasteful number, since it uses less digits than its factorization.

690899472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797927 (or 4797918 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 690899472 is about 26284.9666539640. The cubic root of 690899472 is about 884.0393982018.

The spelling of 690899472 in words is "six hundred ninety million, eight hundred ninety-nine thousand, four hundred seventy-two".