690648 has 32 divisors (see below), whose sum is σ = 1973760. Its totient is φ = 197280.

The previous prime is 690629. The next prime is 690661. The reversal of 690648 is 846096.

It is a super-3 number, since 3×690648³ = 988306223620133376, which contains 333 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888 + ... + 2223.

It is an arithmetic number, because the mean of its divisors is an integer number (61680).

2⁶⁹⁰⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

690648 is an abundant number, since it is smaller than the sum of its proper divisors (1283112).

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

690648 is a wasteful number, since it uses less digits than its factorization.

690648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127 (or 4123 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 690648 is about 831.0523449218. The cubic root of 690648 is about 88.3932128311.

The spelling of 690648 in words is "six hundred ninety thousand, six hundred forty-eight".