309293196 has 12 divisors (see below), whose sum is σ = 721684152. Its totient is φ = 103097728.

The previous prime is 309293177. The next prime is 309293197. The reversal of 309293196 is 691392903.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (309293197) 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, 12887205 + ... + 12887228.

It is an arithmetic number, because the mean of its divisors is an integer number (60140346).

Almost surely, 2^309293196 is an apocalyptic number.

It is an amenable number.

309293196 is an abundant number, since it is smaller than the sum of its proper divisors (412390956).

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

309293196 is a wasteful number, since it uses less digits than its factorization.

309293196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25774440 (or 25774438 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 309293196 is about 17586.7335227438. The cubic root of 309293196 is about 676.2751905272.

The spelling of 309293196 in words is "three hundred nine million, two hundred ninety-three thousand, one hundred ninety-six".