64834380 has 144 divisors (see below), whose sum is σ = 214643520. Its totient is φ = 15745536.

The previous prime is 64834373. The next prime is 64834463. The reversal of 64834380 is 8343846.

64834380 is a `hidden beast` number, since 648 + 3 + 4 + 3 + 8 + 0 = 666.

It is a super-3 number, since 3×64834380³ (a number of 24 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240886 + ... + 241154.

It is an arithmetic number, because the mean of its divisors is an integer number (1490580).

Almost surely, 2^64834380 is an apocalyptic number.

64834380 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 64834380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107321760).

64834380 is an abundant number, since it is smaller than the sum of its proper divisors (149809140).

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

64834380 is a wasteful number, since it uses less digits than its factorization.

64834380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 64834380 is about 8051.9798807498. The cubic root of 64834380 is about 401.7307917646.

The spelling of 64834380 in words is "sixty-four million, eight hundred thirty-four thousand, three hundred eighty".