636090 has 64 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 133632.

The previous prime is 636073. The next prime is 636107. The reversal of 636090 is 90636.

It is an interprime number because it is at equal distance from previous prime (636073) and next prime (636107).

It is a super-2 number, since 2×636090² = 809220976200, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 636090.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2614 + ... + 2846.

It is an arithmetic number, because the mean of its divisors is an integer number (29484).

2⁶³⁶⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).

636090 is an abundant number, since it is smaller than the sum of its proper divisors (1250886).

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

636090 is a wasteful number, since it uses less digits than its factorization.

636090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 636090 is about 797.5525061085. The cubic root of 636090 is about 86.0015323325.

The spelling of 636090 in words is "six hundred thirty-six thousand, ninety".