64430520 has 256 divisors, whose sum is σ = 254361600. Its totient is φ = 12648960.

The previous prime is 64430503. The next prime is 64430533. The reversal of 64430520 is 2503446.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 175377 + ... + 175743.

It is an arithmetic number, because the mean of its divisors is an integer number (993600).

Almost surely, 2^64430520 is an apocalyptic number.

64430520 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 64430520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127180800).

64430520 is an abundant number, since it is smaller than the sum of its proper divisors (189931080).

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

64430520 is a wasteful number, since it uses less digits than its factorization.

64430520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 414 counting only the distinct ones).

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

The square root of 64430520 is about 8026.8624007142. The cubic root of 64430520 is about 400.8949130003.

Adding to 64430520 its reverse (2503446), we get a palindrome (66933966).

The spelling of 64430520 in words is "sixty-four million, four hundred thirty thousand, five hundred twenty".