346540389 has 16 divisors (see below), whose sum is σ = 499593024. Its totient is φ = 212400000.

The previous prime is 346540387. The next prime is 346540423. The reversal of 346540389 is 983045643.

It is not a de Polignac number, because 346540389 - 2¹ = 346540387 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 346540389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346540387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7912 + ... + 27489.

It is an arithmetic number, because the mean of its divisors is an integer number (31224564).

Almost surely, 2^346540389 is an apocalyptic number.

346540389 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

346540389 is a deficient number, since it is larger than the sum of its proper divisors (153052635).

346540389 is a wasteful number, since it uses less digits than its factorization.

346540389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35668.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 346540389 is about 18615.5953168305. The cubic root of 346540389 is about 702.4001886200.

The spelling of 346540389 in words is "three hundred forty-six million, five hundred forty thousand, three hundred eighty-nine".