640053226 has 8 divisors (see below), whose sum is σ = 963357444. Its totient is φ = 318934080.

The previous prime is 640053221. The next prime is 640053251. The reversal of 640053226 is 622350046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 507826225 + 132227001 = 22535^2 + 11499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×640053226² = 819336264226014152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640053194 and 640053203.

It is not an unprimeable number, because it can be changed into a prime (640053221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545535 + ... + 546706.

Almost surely, 2^640053226 is an apocalyptic number.

640053226 is a deficient number, since it is larger than the sum of its proper divisors (323304218).

640053226 is a wasteful number, since it uses less digits than its factorization.

640053226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092536.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 640053226 is about 25299.2732306681. The cubic root of 640053226 is about 861.7977653382.

The spelling of 640053226 in words is "six hundred forty million, fifty-three thousand, two hundred twenty-six".