309378934 has 16 divisors (see below), whose sum is σ = 484745472. Its totient is φ = 147811048.

The previous prime is 309378929. The next prime is 309378947. The reversal of 309378934 is 439873903.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50607 + ... + 56389.

It is an arithmetic number, because the mean of its divisors is an integer number (30296592).

Almost surely, 2^309378934 is an apocalyptic number.

309378934 is a deficient number, since it is larger than the sum of its proper divisors (175366538).

309378934 is a wasteful number, since it uses less digits than its factorization.

309378934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 309378934 is about 17589.1709298648. The cubic root of 309378934 is about 676.3376739854.

The spelling of 309378934 in words is "three hundred nine million, three hundred seventy-eight thousand, nine hundred thirty-four".