345678765 has 64 divisors (see below), whose sum is σ = 605532672. Its totient is φ = 167731200.

The previous prime is 345678743. The next prime is 345678779. The reversal of 345678765 is 567876543.

345678765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 345678765 - 2⁵ = 345678733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1104249 + ... + 1104561.

It is an arithmetic number, because the mean of its divisors is an integer number (9461448).

Almost surely, 2^345678765 is an apocalyptic number.

It is an amenable number.

345678765 is a deficient number, since it is larger than the sum of its proper divisors (259853907).

345678765 is a wasteful number, since it uses less digits than its factorization.

345678765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its digits is 4233600, while the sum is 51.

The square root of 345678765 is about 18592.4383823102. The cubic root of 345678765 is about 701.8175656810.

The spelling of 345678765 in words is "three hundred forty-five million, six hundred seventy-eight thousand, seven hundred sixty-five".