64863824 has 10 divisors (see below), whose sum is σ = 125673690. Its totient is φ = 32431904.

The previous prime is 64863817. The next prime is 64863847. The reversal of 64863824 is 42836846.

It can be written as a sum of positive squares in only one way, i.e., 61905424 + 2958400 = 7868^2 + 1720^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2026979 + ... + 2027010.

It is an arithmetic number, because the mean of its divisors is an integer number (12567369).

Almost surely, 2^64863824 is an apocalyptic number.

It is an amenable number.

64863824 is a deficient number, since it is larger than the sum of its proper divisors (60809866).

64863824 is a wasteful number, since it uses less digits than its factorization.

64863824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053997 (or 4053991 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 64863824 is about 8053.8080434041. The cubic root of 64863824 is about 401.7915968049.

The spelling of 64863824 in words is "sixty-four million, eight hundred sixty-three thousand, eight hundred twenty-four".