305642642 has 8 divisors (see below), whose sum is σ = 460169100. Its totient is φ = 152252944.

The previous prime is 305642639. The next prime is 305642663. The reversal of 305642642 is 246246503.

It can be written as a sum of positive squares in 2 ways, for example, as 292033921 + 13608721 = 17089^2 + 3689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 305642599 and 305642608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283517 + ... + 284592.

Almost surely, 2^305642642 is an apocalyptic number.

305642642 is a deficient number, since it is larger than the sum of its proper divisors (154526458).

305642642 is a wasteful number, since it uses less digits than its factorization.

305642642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568380.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 305642642 is about 17482.6383020413. The cubic root of 305642642 is about 673.6039859451.

The spelling of 305642642 in words is "three hundred five million, six hundred forty-two thousand, six hundred forty-two".