64932840 has 240 divisors, whose sum is σ = 254499300. Its totient is φ = 14805504.

The previous prime is 64932839. The next prime is 64932883. The reversal of 64932840 is 4823946.

It is a happy number.

64932840 is a `hidden beast` number, since 649 + 3 + 2 + 8 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63011844 + 1920996 = 7938^2 + 1386^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64932795 and 64932804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 158556 + ... + 158964.

Almost surely, 2^64932840 is an apocalyptic number.

64932840 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 64932840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127249650).

64932840 is an abundant number, since it is smaller than the sum of its proper divisors (189566460).

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

64932840 is a wasteful number, since it uses less digits than its factorization.

64932840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 64932840 is about 8058.0915854810. The cubic root of 64932840 is about 401.9340502193.

It can be divided in two parts, 649 and 32840, that added together give a square (33489 = 183²).

The spelling of 64932840 in words is "sixty-four million, nine hundred thirty-two thousand, eight hundred forty".