309468478 has 16 divisors (see below), whose sum is σ = 510104304. Its totient is φ = 139639360.

The previous prime is 309468469. The next prime is 309468521. The reversal of 309468478 is 874864903.

It is a super-4 number, since 4×309468478⁴ (a number of 35 digits) contains 4444 as substring.

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, 48325 + ... + 54352.

It is an arithmetic number, because the mean of its divisors is an integer number (31881519).

Almost surely, 2^309468478 is an apocalyptic number.

309468478 is a deficient number, since it is larger than the sum of its proper divisors (200635826).

309468478 is a wasteful number, since it uses less digits than its factorization.

309468478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102827.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 309468478 is about 17591.7161755185. The cubic root of 309468478 is about 676.4029188271.

The spelling of 309468478 in words is "three hundred nine million, four hundred sixty-eight thousand, four hundred seventy-eight".