309498490 has 16 divisors (see below), whose sum is σ = 636682752. Its totient is φ = 106113744.

The previous prime is 309498473. The next prime is 309498493. The reversal of 309498490 is 94894903.

It is a self number, because there is not a number n which added to its sum of digits gives 309498490.

It is not an unprimeable number, because it can be changed into a prime (309498493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2210634 + ... + 2210773.

It is an arithmetic number, because the mean of its divisors is an integer number (39792672).

Almost surely, 2^309498490 is an apocalyptic number.

309498490 is an abundant number, since it is smaller than the sum of its proper divisors (327184262).

309498490 is a wasteful number, since it uses less digits than its factorization.

309498490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421421.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 309498490 is about 17592.5691699649. The cubic root of 309498490 is about 676.4247837877.

The spelling of 309498490 in words is "three hundred nine million, four hundred ninety-eight thousand, four hundred ninety".