349466640 has 160 divisors (see below), whose sum is σ = 1115452416. Its totient is φ = 90478080.

The previous prime is 349466581. The next prime is 349466647. The reversal of 349466640 is 46664943.

It is a junction number, because it is equal to n+sod(n) for n = 349466592 and 349466601.

It is not an unprimeable number, because it can be changed into a prime (349466647) 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, 1656135 + ... + 1656345.

Almost surely, 2^349466640 is an apocalyptic number.

349466640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 349466640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557726208).

349466640 is an abundant number, since it is smaller than the sum of its proper divisors (765985776).

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

349466640 is a wasteful number, since it uses less digits than its factorization.

349466640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 349466640 is about 18694.0268535166. The cubic root of 349466640 is about 704.3717152855.

The spelling of 349466640 in words is "three hundred forty-nine million, four hundred sixty-six thousand, six hundred forty".