309029948 has 24 divisors (see below), whose sum is σ = 558983040. Its totient is φ = 149333760.

The previous prime is 309029947. The next prime is 309029969. The reversal of 309029948 is 849920903.

It is a junction number, because it is equal to n+sod(n) for n = 309029899 and 309029908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309029947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146888 + ... + 148976.

It is an arithmetic number, because the mean of its divisors is an integer number (23290960).

Almost surely, 2^309029948 is an apocalyptic number.

It is an amenable number.

309029948 is a deficient number, since it is larger than the sum of its proper divisors (249953092).

309029948 is a wasteful number, since it uses less digits than its factorization.

309029948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3315 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 309029948 is about 17579.2476517057. The cubic root of 309029948 is about 676.0832705564.

The spelling of 309029948 in words is "three hundred nine million, twenty-nine thousand, nine hundred forty-eight".