64824642 has 12 divisors (see below), whose sum is σ = 140453430. Its totient is φ = 21608208.

The previous prime is 64824619. The next prime is 64824653. The reversal of 64824642 is 24642846.

It is a happy number.

64824642 is a `hidden beast` number, since 6 + 4 + 8 + 2 + 4 + 642 = 666.

64824642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 4124961 = 7791^2 + 2031^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64824597 and 64824606.

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 5 ways as a sum of consecutive naturals, for example, 1800667 + ... + 1800702.

Almost surely, 2^64824642 is an apocalyptic number.

64824642 is an abundant number, since it is smaller than the sum of its proper divisors (75628788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64824642 is a wasteful number, since it uses less digits than its factorization.

64824642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601377 (or 3601374 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 64824642 is about 8051.3751620453. The cubic root of 64824642 is about 401.7106776918.

It can be divided in two parts, 648 and 24642, that multiplied together give a square (15968016 = 3996²).

The spelling of 64824642 in words is "sixty-four million, eight hundred twenty-four thousand, six hundred forty-two".