309746396 has 24 divisors (see below), whose sum is σ = 551824896. Its totient is φ = 152107200.

The previous prime is 309746387. The next prime is 309746407. The reversal of 309746396 is 693647903.

It is a self number, because there is not a number n which added to its sum of digits gives 309746396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48290 + ... + 54326.

It is an arithmetic number, because the mean of its divisors is an integer number (22992704).

Almost surely, 2^309746396 is an apocalyptic number.

It is an amenable number.

309746396 is a deficient number, since it is larger than the sum of its proper divisors (242078500).

309746396 is a wasteful number, since it uses less digits than its factorization.

309746396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6269 (or 6267 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 47.

The square root of 309746396 is about 17599.6135184839. The cubic root of 309746396 is about 676.6053393370.

The spelling of 309746396 in words is "three hundred nine million, seven hundred forty-six thousand, three hundred ninety-six".