309030696 has 144 divisors (see below), whose sum is σ = 918531900. Its totient is φ = 93809664.

The previous prime is 309030677. The next prime is 309030707. The reversal of 309030696 is 696030903.

It can be written as a sum of positive squares in 6 ways, for example, as 33802596 + 275228100 = 5814^2 + 16590^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 309030696.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1326196 + ... + 1326428.

Almost surely, 2^309030696 is an apocalyptic number.

309030696 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309030696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459265950).

309030696 is an abundant number, since it is smaller than the sum of its proper divisors (609501204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309030696 is a wasteful number, since it uses less digits than its factorization.

309030696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 309030696 is about 17579.2689267785. The cubic root of 309030696 is about 676.0838160373.

The spelling of 309030696 in words is "three hundred nine million, thirty thousand, six hundred ninety-six".