825990 has 32 divisors (see below), whose sum is σ = 2163456. Its totient is φ = 200160.

The previous prime is 825983. The next prime is 825991. The reversal of 825990 is 99528.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922 + ... + 1581.

It is an arithmetic number, because the mean of its divisors is an integer number (67608).

2⁸²⁵⁹⁹⁰ is an apocalyptic number.

825990 is an abundant number, since it is smaller than the sum of its proper divisors (1337466).

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

825990 is a wasteful number, since it uses less digits than its factorization.

825990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 825990 is about 908.8399198979. The cubic root of 825990 is about 93.8263733212.

The spelling of 825990 in words is "eight hundred twenty-five thousand, nine hundred ninety".