64136886 has 32 divisors (see below), whose sum is σ = 148169088. Its totient is φ = 18291840.

The previous prime is 64136881. The next prime is 64136887. The reversal of 64136886 is 68863146.

It is a happy number.

It is a super-2 number, since 2×64136886² = 8227080291553992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64136881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27460 + ... + 29703.

It is an arithmetic number, because the mean of its divisors is an integer number (4630284).

Almost surely, 2^64136886 is an apocalyptic number.

64136886 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64136886 is an abundant number, since it is smaller than the sum of its proper divisors (84032202).

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

64136886 is a wasteful number, since it uses less digits than its factorization.

64136886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57196.

The product of its digits is 165888, while the sum is 42.

The square root of 64136886 is about 8008.5508052331. The cubic root of 64136886 is about 400.2849760900.

The spelling of 64136886 in words is "sixty-four million, one hundred thirty-six thousand, eight hundred eighty-six".