309010140 has 240 divisors, whose sum is σ = 1020872160. Its totient is φ = 78174720.

The previous prime is 309010127. The next prime is 309010151. The reversal of 309010140 is 41010903.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5065710 + ... + 5065770.

It is an arithmetic number, because the mean of its divisors is an integer number (4253634).

Almost surely, 2^309010140 is an apocalyptic number.

309010140 is a gapful number since it is divisible by the number (30) 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 309010140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510436080).

309010140 is an abundant number, since it is smaller than the sum of its proper divisors (711862020).

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

309010140 is a wasteful number, since it uses less digits than its factorization.

309010140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 309010140 is about 17578.6842511037. The cubic root of 309010140 is about 676.0688251996.

The spelling of 309010140 in words is "three hundred nine million, ten thousand, one hundred forty".