64863744 has 120 divisors (see below), whose sum is σ = 190482600. Its totient is φ = 19599360.

The previous prime is 64863727. The next prime is 64863751. The reversal of 64863744 is 44736846.

It is a junction number, because it is equal to n+sod(n) for n = 64863696 and 64863705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185682 + ... + 186030.

It is an arithmetic number, because the mean of its divisors is an integer number (1587355).

Almost surely, 2^64863744 is an apocalyptic number.

64863744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64863744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95241300).

64863744 is an abundant number, since it is smaller than the sum of its proper divisors (125618856).

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

64863744 is a wasteful number, since it uses less digits than its factorization.

64863744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 365 counting only the distinct ones).

The product of its digits is 387072, while the sum is 42.

The square root of 64863744 is about 8053.8030768079. The cubic root of 64863744 is about 401.7914316212.

The spelling of 64863744 in words is "sixty-four million, eight hundred sixty-three thousand, seven hundred forty-four".