303990 has 16 divisors (see below), whose sum is σ = 729648. Its totient is φ = 81056.

The previous prime is 303983. The next prime is 303997. The reversal of 303990 is 99303.

It is an interprime number because it is at equal distance from previous prime (303983) and next prime (303997).

It is a self number, because there is not a number n which added to its sum of digits gives 303990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5037 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (45603).

2³⁰³⁹⁹⁰ is an apocalyptic number.

303990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

303990 is an abundant number, since it is smaller than the sum of its proper divisors (425658).

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

303990 is a wasteful number, since it uses less digits than its factorization.

303990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10143.

The product of its (nonzero) digits is 729, while the sum is 24.

The square root of 303990 is about 551.3528815559. The cubic root of 303990 is about 67.2387708526.

The spelling of 303990 in words is "three hundred three thousand, nine hundred ninety".