349990 has 16 divisors (see below), whose sum is σ = 650880. Its totient is φ = 135360.

The previous prime is 349981. The next prime is 350003. The reversal of 349990 is 99943.

349990 = T₃₆ + T₃₇ + ... + T₁₂₈.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255 + ... + 874.

It is an arithmetic number, because the mean of its divisors is an integer number (40680).

2³⁴⁹⁹⁹⁰ is an apocalyptic number.

349990 is a deficient number, since it is larger than the sum of its proper divisors (300890).

349990 is a wasteful number, since it uses less digits than its factorization.

349990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 349990 is about 591.5995267070. The cubic root of 349990 is about 70.4723161429.

Subtracting from 349990 its reverse (99943), we obtain a cube (250047 = 63³).

The spelling of 349990 in words is "three hundred forty-nine thousand, nine hundred ninety".