690498 has 32 divisors (see below), whose sum is σ = 1617600. Its totient is φ = 217728.

The previous prime is 690493. The next prime is 690509. The reversal of 690498 is 894096.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690498.

It is not an unprimeable number, because it can be changed into a prime (690491) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 690 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (50550).

2⁶⁹⁰⁴⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808800).

690498 is an abundant number, since it is smaller than the sum of its proper divisors (927102).

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

690498 is a wasteful number, since it uses less digits than its factorization.

690498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 690498 is about 830.9620929982. The cubic root of 690498 is about 88.3868130722.

The spelling of 690498 in words is "six hundred ninety thousand, four hundred ninety-eight".