345289690 has 16 divisors (see below), whose sum is σ = 624193128. Its totient is φ = 137522176.

The previous prime is 345289673. The next prime is 345289691. The reversal of 345289690 is 96982543.

It can be written as a sum of positive squares in 4 ways, for example, as 257698809 + 87590881 = 16053^2 + 9359^2 .

It is a super-2 number, since 2×345289690² = 238449940040592200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 345289690.

It is not an unprimeable number, because it can be changed into a prime (345289691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71767 + ... + 76426.

Almost surely, 2^345289690 is an apocalyptic number.

345289690 is a deficient number, since it is larger than the sum of its proper divisors (278903438).

345289690 is a wasteful number, since it uses less digits than its factorization.

345289690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148433.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 345289690 is about 18581.9721773551. The cubic root of 345289690 is about 701.5541591047.

The spelling of 345289690 in words is "three hundred forty-five million, two hundred eighty-nine thousand, six hundred ninety".