345219990 has 32 divisors (see below), whose sum is σ = 850923360. Its totient is φ = 89570304.

The previous prime is 345219989. The next prime is 345220049. The reversal of 345219990 is 99912543.

It is a congruent number.

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, 154395 + ... + 156614.

It is an arithmetic number, because the mean of its divisors is an integer number (26591355).

Almost surely, 2^345219990 is an apocalyptic number.

345219990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

345219990 is an abundant number, since it is smaller than the sum of its proper divisors (505703370).

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

345219990 is a wasteful number, since it uses less digits than its factorization.

345219990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311056.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 345219990 is about 18580.0966090061. The cubic root of 345219990 is about 701.5069508070.

The spelling of 345219990 in words is "three hundred forty-five million, two hundred nineteen thousand, nine hundred ninety".