345278406 has 16 divisors (see below), whose sum is σ = 753334848. Its totient is φ = 104629800.

The previous prime is 345278399. The next prime is 345278419. The reversal of 345278406 is 604872543.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2615680 + ... + 2615811.

It is an arithmetic number, because the mean of its divisors is an integer number (47083428).

Almost surely, 2^345278406 is an apocalyptic number.

345278406 is an abundant number, since it is smaller than the sum of its proper divisors (408056442).

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

345278406 is a wasteful number, since it uses less digits than its factorization.

345278406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231507.

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 345278406 is about 18581.6685472538. The cubic root of 345278406 is about 701.5465168036.

The spelling of 345278406 in words is "three hundred forty-five million, two hundred seventy-eight thousand, four hundred six".