64611228 has 24 divisors (see below), whose sum is σ = 164465280. Its totient is φ = 19579120.

The previous prime is 64611227. The next prime is 64611233. The reversal of 64611228 is 82211646.

It is a super-2 number, since 2×64611228² = 8349221567335968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64611195 and 64611204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64611227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244608 + ... + 244871.

It is an arithmetic number, because the mean of its divisors is an integer number (6852720).

Almost surely, 2^64611228 is an apocalyptic number.

It is an amenable number.

64611228 is an abundant number, since it is smaller than the sum of its proper divisors (99854052).

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

64611228 is a wasteful number, since it uses less digits than its factorization.

64611228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489497 (or 489495 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 64611228 is about 8038.1109721128. The cubic root of 64611228 is about 401.2693592236.

The spelling of 64611228 in words is "sixty-four million, six hundred eleven thousand, two hundred twenty-eight".