390243272 has 16 divisors (see below), whose sum is σ = 732163740. Its totient is φ = 194999616.

The previous prime is 390243257. The next prime is 390243379. The reversal of 390243272 is 272342093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 366875716 + 23367556 = 19154^2 + 4834^2 .

It is a super-2 number, since 2×390243272² = 304579622682531968, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 863 + ... + 27950.

Almost surely, 2^390243272 is an apocalyptic number.

It is an amenable number.

390243272 is a deficient number, since it is larger than the sum of its proper divisors (341920468).

390243272 is a wasteful number, since it uses less digits than its factorization.

390243272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30512 (or 30508 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 390243272 is about 19754.5759762137. The cubic root of 390243272 is about 730.7662386649.

It can be divided in two parts, 3902 and 43272, that added together give a palindrome (47174).

The spelling of 390243272 in words is "three hundred ninety million, two hundred forty-three thousand, two hundred seventy-two".