309123470 has 32 divisors (see below), whose sum is σ = 578128320. Its totient is φ = 118863360.

The previous prime is 309123443. The next prime is 309123481. The reversal of 309123470 is 74321903.

It is a Harshad number since it is a multiple of its sum of digits (29).

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, 67679 + ... + 72101.

It is an arithmetic number, because the mean of its divisors is an integer number (18066510).

Almost surely, 2^309123470 is an apocalyptic number.

309123470 is a deficient number, since it is larger than the sum of its proper divisors (269004850).

309123470 is a wasteful number, since it uses less digits than its factorization.

309123470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4700.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 309123470 is about 17581.9074619337. The cubic root of 309123470 is about 676.1514648989.

The spelling of 309123470 in words is "three hundred nine million, one hundred twenty-three thousand, four hundred seventy".