349986540 has 24 divisors (see below), whose sum is σ = 979962480. Its totient is φ = 93329728.

The previous prime is 349986509. The next prime is 349986541. The reversal of 349986540 is 45689943.

It is a self number, because there is not a number n which added to its sum of digits gives 349986540.

It is not an unprimeable number, because it can be changed into a prime (349986541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2916495 + ... + 2916614.

It is an arithmetic number, because the mean of its divisors is an integer number (40831770).

Almost surely, 2^349986540 is an apocalyptic number.

349986540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

349986540 is an abundant number, since it is smaller than the sum of its proper divisors (629975940).

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

349986540 is a wasteful number, since it uses less digits than its factorization.

349986540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5833121 (or 5833119 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 349986540 is about 18707.9271967794. The cubic root of 349986540 is about 704.7208391249.

The spelling of 349986540 in words is "three hundred forty-nine million, nine hundred eighty-six thousand, five hundred forty".