305144690 has 16 divisors (see below), whose sum is σ = 549554328. Its totient is φ = 121992576.

The previous prime is 305144647. The next prime is 305144743. The reversal of 305144690 is 96441503.

It can be written as a sum of positive squares in 4 ways, for example, as 231922441 + 73222249 = 15229^2 + 8557^2 .

It is a super-2 number, since 2×305144690² = 186226563670392200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14444 + ... + 28616.

Almost surely, 2^305144690 is an apocalyptic number.

305144690 is a deficient number, since it is larger than the sum of its proper divisors (244409638).

305144690 is a wasteful number, since it uses less digits than its factorization.

305144690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16333.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 305144690 is about 17468.3911680498. The cubic root of 305144690 is about 673.2379759634.

The spelling of 305144690 in words is "three hundred five million, one hundred forty-four thousand, six hundred ninety".