64091228 has 12 divisors (see below), whose sum is σ = 114061080. Its totient is φ = 31502352.

The previous prime is 64091219. The next prime is 64091243. The reversal of 64091228 is 82219046.

It is a junction number, because it is equal to n+sod(n) for n = 64091194 and 64091203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135551 + ... + 136022.

It is an arithmetic number, because the mean of its divisors is an integer number (9505090).

Almost surely, 2^64091228 is an apocalyptic number.

It is an amenable number.

64091228 is a deficient number, since it is larger than the sum of its proper divisors (49969852).

64091228 is a wasteful number, since it uses less digits than its factorization.

64091228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271636 (or 271634 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 64091228 is about 8005.6997195748. The cubic root of 64091228 is about 400.1899680994.

The spelling of 64091228 in words is "sixty-four million, ninety-one thousand, two hundred twenty-eight".