690472 has 16 divisors (see below), whose sum is σ = 1371060. Its totient is φ = 324864.

The previous prime is 690467. The next prime is 690491. The reversal of 690472 is 274096.

It can be written as a sum of positive squares in 2 ways, for example, as 556516 + 133956 = 746^2 + 366^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 690472.

It is an unprimeable number.

690472 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2403 + ... + 2674.

2⁶⁹⁰⁴⁷² is an apocalyptic number.

It is an amenable number.

690472 is a deficient number, since it is larger than the sum of its proper divisors (680588).

690472 is a wasteful number, since it uses less digits than its factorization.

690472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100 (or 5096 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 690472 is about 830.9464483347. The cubic root of 690472 is about 88.3857036865.

The spelling of 690472 in words is "six hundred ninety thousand, four hundred seventy-two".