342990 has 48 divisors (see below), whose sum is σ = 924768. Its totient is φ = 88128.

The previous prime is 342989. The next prime is 343019. The reversal of 342990 is 99243.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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, 3279 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (19266).

2³⁴²⁹⁹⁰ is an apocalyptic number.

342990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 342990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462384).

342990 is an abundant number, since it is smaller than the sum of its proper divisors (581778).

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

342990 is a wasteful number, since it uses less digits than its factorization.

342990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 342990 is about 585.6534811644. The cubic root of 342990 is about 69.9993197213. Note that the first 3 decimals are identical.

The spelling of 342990 in words is "three hundred forty-two thousand, nine hundred ninety".