345388554 has 72 divisors (see below), whose sum is σ = 875461860. Its totient is φ = 98122752.

The previous prime is 345388531. The next prime is 345388559. The reversal of 345388554 is 455883543.

345388554 is a `hidden beast` number, since 34 + 538 + 85 + 5 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 329967225 + 15421329 = 18165^2 + 3927^2 .

It is not an unprimeable number, because it can be changed into a prime (345388559) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 169212 + ... + 171240.

Almost surely, 2^345388554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345388554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437730930).

345388554 is an abundant number, since it is smaller than the sum of its proper divisors (530073306).

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

345388554 is a wasteful number, since it uses less digits than its factorization.

345388554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244 (or 2234 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 345388554 is about 18584.6321997504. The cubic root of 345388554 is about 701.6211094886.

The spelling of 345388554 in words is "three hundred forty-five million, three hundred eighty-eight thousand, five hundred fifty-four".