523890 has 24 divisors (see below), whose sum is σ = 1362348. Its totient is φ = 139680.

The previous prime is 523877. The next prime is 523903. The reversal of 523890 is 98325.

It is an interprime number because it is at equal distance from previous prime (523877) and next prime (523903).

It can be written as a sum of positive squares in 2 ways, for example, as 514089 + 9801 = 717^2 + 99^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2821 + ... + 3000.

2⁵²³⁸⁹⁰ is an apocalyptic number.

523890 is an abundant number, since it is smaller than the sum of its proper divisors (838458).

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

523890 is a wasteful number, since it uses less digits than its factorization.

523890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834 (or 5831 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 523890 is about 723.8024592387. The cubic root of 523890 is about 80.6145380332.

The spelling of 523890 in words is "five hundred twenty-three thousand, eight hundred ninety".