64117320 has 32 divisors (see below), whose sum is σ = 192352320. Its totient is φ = 17097920.

The previous prime is 64117297. The next prime is 64117321. The reversal of 64117320 is 2371146.

It is a super-2 number, since 2×64117320² = 8222061447964800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (64117321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267036 + ... + 267275.

It is an arithmetic number, because the mean of its divisors is an integer number (6011010).

Almost surely, 2^64117320 is an apocalyptic number.

64117320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64117320 is an abundant number, since it is smaller than the sum of its proper divisors (128235000).

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

64117320 is a wasteful number, since it uses less digits than its factorization.

64117320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534325 (or 534321 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 64117320 is about 8007.3291427292. The cubic root of 64117320 is about 400.2442674698.

Adding to 64117320 its reverse (2371146), we get a palindrome (66488466).

It can be divided in two parts, 6411 and 7320, that added together give a palindrome (13731).

The spelling of 64117320 in words is "sixty-four million, one hundred seventeen thousand, three hundred twenty".