64634450 has 36 divisors (see below), whose sum is σ = 123384030. Its totient is φ = 25190400.

The previous prime is 64634429. The next prime is 64634497. The reversal of 64634450 is 5443646.

It can be written as a sum of positive squares in 9 ways, for example, as 8369449 + 56265001 = 2893^2 + 7501^2 .

It is a super-2 number, since 2×64634450² = 8355224253605000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 83666 + ... + 84434.

Almost surely, 2^64634450 is an apocalyptic number.

64634450 is a deficient number, since it is larger than the sum of its proper divisors (58749580).

64634450 is a wasteful number, since it uses less digits than its factorization.

64634450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 64634450 is about 8039.5553359623. Note that the first 3 decimals coincide. The cubic root of 64634450 is about 401.3174270347.

The spelling of 64634450 in words is "sixty-four million, six hundred thirty-four thousand, four hundred fifty".