309701340 has 192 divisors, whose sum is σ = 1047957120. Its totient is φ = 75479040.

The previous prime is 309701297. The next prime is 309701347. The reversal of 309701340 is 43107903.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309701347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1102000 + ... + 1102280.

It is an arithmetic number, because the mean of its divisors is an integer number (5458110).

Almost surely, 2^309701340 is an apocalyptic number.

309701340 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 309701340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523978560).

309701340 is an abundant number, since it is smaller than the sum of its proper divisors (738255780).

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

309701340 is a wasteful number, since it uses less digits than its factorization.

309701340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 309701340 is about 17598.3334438236. Note that the first 3 decimals coincide. The cubic root of 309701340 is about 676.5725311980.

The spelling of 309701340 in words is "three hundred nine million, seven hundred one thousand, three hundred forty".