309490200 has 192 divisors, whose sum is σ = 1095540000. Its totient is φ = 80248320.

The previous prime is 309490199. The next prime is 309490213. The reversal of 309490200 is 2094903.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199026 + ... + 200574.

Almost surely, 2^309490200 is an apocalyptic number.

309490200 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 309490200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547770000).

309490200 is an abundant number, since it is smaller than the sum of its proper divisors (786049800).

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

309490200 is a wasteful number, since it uses less digits than its factorization.

309490200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 309490200 is about 17592.3335575472. Note that the first 3 decimals coincide. The cubic root of 309490200 is about 676.4187443274.

The spelling of 309490200 in words is "three hundred nine million, four hundred ninety thousand, two hundred".