64804140 has 36 divisors (see below), whose sum is σ = 196573104. Its totient is φ = 17281056.

The previous prime is 64804121. The next prime is 64804169. The reversal of 64804140 is 4140846.

64804140 is a `hidden beast` number, since 648 + 0 + 4 + 14 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×64804140² = 8399153122279200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179832 + ... + 180191.

It is an arithmetic number, because the mean of its divisors is an integer number (5460364).

Almost surely, 2^64804140 is an apocalyptic number.

64804140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64804140 is an abundant number, since it is smaller than the sum of its proper divisors (131768964).

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

64804140 is a wasteful number, since it uses less digits than its factorization.

64804140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360038 (or 360033 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 64804140 is about 8050.1018627096. The cubic root of 64804140 is about 401.6683237326.

Adding to 64804140 its reverse (4140846), we get a palindrome (68944986).

The spelling of 64804140 in words is "sixty-four million, eight hundred four thousand, one hundred forty".