309445894 has 8 divisors (see below), whose sum is σ = 488598840. Its totient is φ = 146579616.

The previous prime is 309445891. The next prime is 309445897. The reversal of 309445894 is 498544903.

309445894 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (309445891) and next prime (309445897).

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

It is a super-2 number, since 2×309445894² = 191513522626918472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309445891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4071619 + ... + 4071694.

It is an arithmetic number, because the mean of its divisors is an integer number (61074855).

Almost surely, 2^309445894 is an apocalyptic number.

309445894 is a deficient number, since it is larger than the sum of its proper divisors (179152946).

309445894 is a wasteful number, since it uses less digits than its factorization.

309445894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8143334.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 309445894 is about 17591.0742707772. The cubic root of 309445894 is about 676.3864645340.

The spelling of 309445894 in words is "three hundred nine million, four hundred forty-five thousand, eight hundred ninety-four".