705990 has 32 divisors (see below), whose sum is σ = 1718496. Its totient is φ = 185600.

The previous prime is 705989. The next prime is 706001. The reversal of 705990 is 99507.

It is a happy number.

705990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2914 + ... + 3146.

It is an arithmetic number, because the mean of its divisors is an integer number (53703).

2⁷⁰⁵⁹⁹⁰ is an apocalyptic number.

705990 is an abundant number, since it is smaller than the sum of its proper divisors (1012506).

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

705990 is a wasteful number, since it uses less digits than its factorization.

705990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 2835, while the sum is 30.

The square root of 705990 is about 840.2321107884. The cubic root of 705990 is about 89.0429452298.

The spelling of 705990 in words is "seven hundred five thousand, nine hundred ninety".