309191243070 has 32 divisors (see below), whose sum is σ = 743235033600. Its totient is φ = 82320325920.

The previous prime is 309191243069. The next prime is 309191243143. The reversal of 309191243070 is 70342191903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8147770 + ... + 8185629.

It is an arithmetic number, because the mean of its divisors is an integer number (23226094800).

Almost surely, 2^309191243070 is an apocalyptic number.

309191243070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

309191243070 is an abundant number, since it is smaller than the sum of its proper divisors (434043790530).

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

309191243070 is a wasteful number, since it uses less digits than its factorization.

309191243070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16334040.

The product of its (nonzero) digits is 40824, while the sum is 39.

The spelling of 309191243070 in words is "three hundred nine billion, one hundred ninety-one million, two hundred forty-three thousand, seventy".