845619906 has 32 divisors (see below), whose sum is σ = 1722913920. Its totient is φ = 276643584.

The previous prime is 845619889. The next prime is 845619913. The reversal of 845619906 is 609916548.

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 15 ways as a sum of consecutive naturals, for example, 63780 + ... + 75888.

It is an arithmetic number, because the mean of its divisors is an integer number (53841060).

Almost surely, 2^845619906 is an apocalyptic number.

845619906 is an abundant number, since it is smaller than the sum of its proper divisors (877294014).

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

845619906 is a wasteful number, since it uses less digits than its factorization.

845619906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12330.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 845619906 is about 29079.5444599808. The cubic root of 845619906 is about 945.6383268805.

The spelling of 845619906 in words is "eight hundred forty-five million, six hundred nineteen thousand, nine hundred six".