345720402 has 48 divisors (see below), whose sum is σ = 763139520. Its totient is φ = 113088096.

The previous prime is 345720377. The next prime is 345720407. The reversal of 345720402 is 204027543.

345720402 is a `hidden beast` number, since 3 + 457 + 204 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (345720407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 529108 + ... + 529760.

It is an arithmetic number, because the mean of its divisors is an integer number (15898740).

Almost surely, 2^345720402 is an apocalyptic number.

345720402 is an abundant number, since it is smaller than the sum of its proper divisors (417419118).

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

345720402 is a wasteful number, since it uses less digits than its factorization.

345720402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 345720402 is about 18593.5580780011. The cubic root of 345720402 is about 701.8457425201.

Adding to 345720402 its reverse (204027543), we get a palindrome (549747945).

The spelling of 345720402 in words is "three hundred forty-five million, seven hundred twenty thousand, four hundred two".