64538760 has 128 divisors (see below), whose sum is σ = 227525760. Its totient is φ = 14438400.

The previous prime is 64538753. The next prime is 64538777. The reversal of 64538760 is 6783546.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15280 + ... + 19040.

It is an arithmetic number, because the mean of its divisors is an integer number (1777545).

Almost surely, 2^64538760 is an apocalyptic number.

64538760 is a gapful number since it is divisible by the number (60) 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 64538760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113762880).

64538760 is an abundant number, since it is smaller than the sum of its proper divisors (162987000).

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

64538760 is a wasteful number, since it uses less digits than its factorization.

64538760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3799 (or 3795 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 64538760 is about 8033.6019318858. The cubic root of 64538760 is about 401.1192817662.

The spelling of 64538760 in words is "sixty-four million, five hundred thirty-eight thousand, seven hundred sixty".