64432500 has 180 divisors, whose sum is σ = 209407968. Its totient is φ = 15400000.

The previous prime is 64432463. The next prime is 64432507. The reversal of 64432500 is 523446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64432507) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 907465 + ... + 907535.

Almost surely, 2^64432500 is an apocalyptic number.

64432500 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 64432500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104703984).

64432500 is an abundant number, since it is smaller than the sum of its proper divisors (144975468).

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

64432500 is a wasteful number, since it uses less digits than its factorization.

64432500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 64432500 is about 8026.9857356295. The cubic root of 64432500 is about 400.8990195624.

Adding to 64432500 its reverse (523446), we get a palindrome (64955946).

The spelling of 64432500 in words is "sixty-four million, four hundred thirty-two thousand, five hundred".