345502404 has 72 divisors (see below), whose sum is σ = 973004760. Its totient is φ = 102638592.

The previous prime is 345502369. The next prime is 345502427. The reversal of 345502404 is 404205543.

It can be written as a sum of positive squares in 4 ways, for example, as 3992004 + 341510400 = 1998^2 + 18480^2 .

It is a super-2 number, since 2×345502404² = 238743822339558432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 844 + ... + 26300.

It is an arithmetic number, because the mean of its divisors is an integer number (13513955).

Almost surely, 2^345502404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345502404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486502380).

345502404 is an abundant number, since it is smaller than the sum of its proper divisors (627502356).

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

345502404 is a wasteful number, since it uses less digits than its factorization.

345502404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25509 (or 25504 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 345502404 is about 18587.6949619903. The cubic root of 345502404 is about 701.6981925178.

Adding to 345502404 its reverse (404205543), we get a palindrome (749707947).

The spelling of 345502404 in words is "three hundred forty-five million, five hundred two thousand, four hundred four".