309369490 has 16 divisors (see below), whose sum is σ = 557435160. Its totient is φ = 123621120.

The previous prime is 309369443. The next prime is 309369503. The reversal of 309369490 is 94963903.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 296631729 + 12737761 = 17223^2 + 3569^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5241 + ... + 25420.

Almost surely, 2^309369490 is an apocalyptic number.

309369490 is a deficient number, since it is larger than the sum of its proper divisors (248065670).

309369490 is a wasteful number, since it uses less digits than its factorization.

309369490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31677.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 309369490 is about 17588.9024671808. The cubic root of 309369490 is about 676.3307920279.

The spelling of 309369490 in words is "three hundred nine million, three hundred sixty-nine thousand, four hundred ninety".