690398 has 8 divisors (see below), whose sum is σ = 1052760. Its totient is φ = 339480.

The previous prime is 690397. The next prime is 690407. The reversal of 690398 is 893096.

690398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×690398³ = 987233374077974376, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2708 + ... + 2951.

It is an arithmetic number, because the mean of its divisors is an integer number (131595).

2⁶⁹⁰³⁹⁸ is an apocalyptic number.

690398 is a deficient number, since it is larger than the sum of its proper divisors (362362).

690398 is a wasteful number, since it uses less digits than its factorization.

690398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5722.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 690398 is about 830.9019196030. The cubic root of 690398 is about 88.3825460514.

The spelling of 690398 in words is "six hundred ninety thousand, three hundred ninety-eight".