690026 has 8 divisors (see below), whose sum is σ = 1070820. Its totient is φ = 333088.

The previous prime is 689987. The next prime is 690037. The reversal of 690026 is 620096.

690026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 600625 + 89401 = 775^2 + 299^2 .

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

It is a super-2 number, since 2×690026² = 952271761352, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 689983 and 690010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5891 + ... + 6006.

2⁶⁹⁰⁰²⁶ is an apocalyptic number.

690026 is a deficient number, since it is larger than the sum of its proper divisors (380794).

690026 is a wasteful number, since it uses less digits than its factorization.

690026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11928.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 690026 is about 830.6780363053. The cubic root of 690026 is about 88.3666691157.

The spelling of 690026 in words is "six hundred ninety thousand, twenty-six".