623490 has 32 divisors (see below), whose sum is σ = 1710720. Its totient is φ = 142464.

The previous prime is 623477. The next prime is 623521. The reversal of 623490 is 94326.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6³ + 2¹⁵ + 4² + 3¹² + 9⁵ + 0 .

It is a self number, because there is not a number n which added to its sum of digits gives 623490.

It is a congruent number.

It is an unprimeable number.

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, 1275 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2⁶²³⁴⁹⁰ is an apocalyptic number.

623490 is an abundant number, since it is smaller than the sum of its proper divisors (1087230).

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

623490 is a wasteful number, since it uses less digits than its factorization.

623490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 623490 is about 789.6138296661. The cubic root of 623490 is about 85.4298867766.

The spelling of 623490 in words is "six hundred twenty-three thousand, four hundred ninety".