345172788 has 36 divisors (see below), whose sum is σ = 873522468. Its totient is φ = 114925440.

The previous prime is 345172783. The next prime is 345172823. The reversal of 345172788 is 887271543.

345172788 is a `hidden beast` number, since 34 + 517 + 27 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 170615844 + 174556944 = 13062^2 + 13212^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345172783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29278 + ... + 39338.

It is an arithmetic number, because the mean of its divisors is an integer number (24264513).

Almost surely, 2^345172788 is an apocalyptic number.

It is an amenable number.

345172788 is an abundant number, since it is smaller than the sum of its proper divisors (528349680).

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

345172788 is a wasteful number, since it uses less digits than its factorization.

345172788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11024 (or 11019 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 345172788 is about 18578.8263353744. The cubic root of 345172788 is about 701.4749769533.

The spelling of 345172788 in words is "three hundred forty-five million, one hundred seventy-two thousand, seven hundred eighty-eight".