309828142 has 32 divisors (see below), whose sum is σ = 513656640. Its totient is φ = 139276800.

The previous prime is 309828139. The next prime is 309828143. The reversal of 309828142 is 241828903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309828143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207334 + ... + 208822.

It is an arithmetic number, because the mean of its divisors is an integer number (16051770).

Almost surely, 2^309828142 is an apocalyptic number.

309828142 is a deficient number, since it is larger than the sum of its proper divisors (203828498).

309828142 is a wasteful number, since it uses less digits than its factorization.

309828142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 309828142 is about 17601.9357458207. The cubic root of 309828142 is about 676.6648556766.

The spelling of 309828142 in words is "three hundred nine million, eight hundred twenty-eight thousand, one hundred forty-two".