353840 has 20 divisors (see below), whose sum is σ = 822864. Its totient is φ = 141504.

The previous prime is 353833. The next prime is 353867. The reversal of 353840 is 48353.

It is a tau number, because it is divible by the number of its divisors (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 353840.

It is an unprimeable number.

353840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2132 + ... + 2291.

2³⁵³⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

353840 is an abundant number, since it is smaller than the sum of its proper divisors (469024).

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

353840 is a wasteful number, since it uses less digits than its factorization.

353840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436 (or 4430 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 353840 is about 594.8445175002. The cubic root of 353840 is about 70.7297802516.

The spelling of 353840 in words is "three hundred fifty-three thousand, eight hundred forty".