349909890 has 64 divisors (see below), whose sum is σ = 964362240. Its totient is φ = 80360640.

The previous prime is 349909801. The next prime is 349909891. The reversal of 349909890 is 98909943.

It is a super-2 number, since 2×349909890² = 244873862239624200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (349909891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21634 + ... + 34173.

It is an arithmetic number, because the mean of its divisors is an integer number (15068160).

Almost surely, 2^349909890 is an apocalyptic number.

349909890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

349909890 is an abundant number, since it is smaller than the sum of its proper divisors (614452350).

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

349909890 is a wasteful number, since it uses less digits than its factorization.

349909890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55847.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 349909890 is about 18705.8784877909. The cubic root of 349909890 is about 704.6693887689.

The spelling of 349909890 in words is "three hundred forty-nine million, nine hundred nine thousand, eight hundred ninety".