349890 has 32 divisors (see below), whose sum is σ = 855360. Its totient is φ = 91584.

The previous prime is 349871. The next prime is 349903. The reversal of 349890 is 98943.

It is an alternating number because its digits alternate between odd and even.

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, 3156 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (26730).

2³⁴⁹⁸⁹⁰ is an apocalyptic number.

349890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

349890 is an abundant number, since it is smaller than the sum of its proper divisors (505470).

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

349890 is a wasteful number, since it uses less digits than its factorization.

349890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 349890 is about 591.5150040362. The cubic root of 349890 is about 70.4656036627.

The spelling of 349890 in words is "three hundred forty-nine thousand, eight hundred ninety".