635490 has 48 divisors (see below), whose sum is σ = 1729728. Its totient is φ = 161568.

The previous prime is 635483. The next prime is 635507. The reversal of 635490 is 94536.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1917 + ... + 2223.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2⁶³⁵⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864864).

635490 is an abundant number, since it is smaller than the sum of its proper divisors (1094238).

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

635490 is a wasteful number, since it uses less digits than its factorization.

635490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 635490 is about 797.1762665810. The cubic root of 635490 is about 85.9744831454.

Subtracting from 635490 its product of nonzero digits (3240), we obtain a triangular number (632250 = T₁₁₂₄).

The spelling of 635490 in words is "six hundred thirty-five thousand, four hundred ninety".