64401886 has 16 divisors (see below), whose sum is σ = 100976544. Its totient is φ = 30747904.

The previous prime is 64401881. The next prime is 64401893. The reversal of 64401886 is 68810446.

64401886 is a modest number, since divided by 1886 gives 644 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44226 + ... + 45658.

It is an arithmetic number, because the mean of its divisors is an integer number (6311034).

Almost surely, 2^64401886 is an apocalyptic number.

64401886 is a deficient number, since it is larger than the sum of its proper divisors (36574658).

64401886 is a wasteful number, since it uses less digits than its factorization.

64401886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 64401886 is about 8025.0785665936. The cubic root of 64401886 is about 400.8355160671.

The spelling of 64401886 in words is "sixty-four million, four hundred one thousand, eight hundred eighty-six".