945990 has 48 divisors (see below), whose sum is σ = 2572128. Its totient is φ = 240768.

The previous prime is 945983. The next prime is 946003. The reversal of 945990 is 99549.

It is a congruent 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, 1842 + ... + 2298.

It is an arithmetic number, because the mean of its divisors is an integer number (53586).

2⁹⁴⁵⁹⁹⁰ is an apocalyptic number.

945990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 945990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286064).

945990 is an abundant number, since it is smaller than the sum of its proper divisors (1626138).

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

945990 is a wasteful number, since it uses less digits than its factorization.

945990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 945990 is about 972.6201725237. The cubic root of 945990 is about 98.1662456596.

It can be divided in two parts, 94 and 5990, that added together give a square (6084 = 78²).

The spelling of 945990 in words is "nine hundred forty-five thousand, nine hundred ninety".