345402224 has 40 divisors (see below), whose sum is σ = 705303072. Its totient is φ = 163539200.

The previous prime is 345402223. The next prime is 345402251. The reversal of 345402224 is 422204543.

It is a happy number.

It is a Cunningham number, because it is equal to 18585²-1.

It is a junction number, because it is equal to n+sod(n) for n = 345402193 and 345402202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345402223) 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, 32522 + ... + 41814.

Almost surely, 2^345402224 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 345402224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352651536).

345402224 is an abundant number, since it is smaller than the sum of its proper divisors (359900848).

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

345402224 is a wasteful number, since it uses less digits than its factorization.

345402224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9425 (or 9419 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 345402224 is about 18584.9999730966. Note that the first 4 decimals coincide. The cubic root of 345402224 is about 701.6303657633.

Adding to 345402224 its reverse (422204543), we get a palindrome (767606767).

The spelling of 345402224 in words is "three hundred forty-five million, four hundred two thousand, two hundred twenty-four".