309028400 has 30 divisors (see below), whose sum is σ = 742441692. Its totient is φ = 123611200.

The previous prime is 309028393. The next prime is 309028417. The reversal of 309028400 is 4820903.

It is a self number, because there is not a number n which added to its sum of digits gives 309028400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 385886 + ... + 386685.

Almost surely, 2^309028400 is an apocalyptic number.

It is an amenable number.

309028400 is an abundant number, since it is smaller than the sum of its proper divisors (433413292).

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

309028400 is a wasteful number, since it uses less digits than its factorization.

309028400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772589 (or 772578 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 309028400 is about 17579.2036224625. The cubic root of 309028400 is about 676.0821416705.

The spelling of 309028400 in words is "three hundred nine million, twenty-eight thousand, four hundred".